Table of Contents
385 relations: Abundance of the chemical elements, Acid, Acid–base reaction, Activated carbon, Air cooling, Airship, Alternative fuel vehicle, Aluminium, Aluminium oxide, American Institute of Chemical Engineers, Ammonia, Ammonia production, Ammonium perchlorate composite propellant, Amorphous carbon, Amorphous metal, Amorphous silicon, Anaerobic corrosion, Angular momentum, Anoxic waters, Antihydrogen, Antimatter, Antiproton, Antoine Lavoisier, Aqueous solution, Asphyxiant gas, Atmospheric escape, Atom, Atomic hydrogen welding, Atomic nucleus, Atomic number, Atomic orbital, Aurora, Autoignition temperature, Balloon, Baryon, BASF, Battery electric vehicle, BBC, BBC Four, Beta decay, Beta particle, Big Bang, Biochemistry, Biohydrogen, Birkeland current, Bohr model, Bond-dissociation energy, Borane, Boron, Boron group, ... Expand index (335 more) »
- Airship technology
- Diatomic nonmetals
- Gaseous signaling molecules
- Least dense things
- Reactive nonmetals
Abundance of the chemical elements
The abundance of the chemical elements is a measure of the occurrence of the chemical elements relative to all other elements in a given environment.
See Hydrogen and Abundance of the chemical elements
Acid
An acid is a molecule or ion capable of either donating a proton (i.e. hydrogen ion, H+), known as a Brønsted–Lowry acid, or forming a covalent bond with an electron pair, known as a Lewis acid.
Acid–base reaction
In chemistry, an acid–base reaction is a chemical reaction that occurs between an acid and a base.
See Hydrogen and Acid–base reaction
Activated carbon
Activated carbon, also called activated charcoal, is a form of carbon commonly used to filter contaminants from water and air, among many other uses.
See Hydrogen and Activated carbon
Air cooling
Air cooling is a method of dissipating heat.
Airship
An airship is a type of aerostat or lighter-than-air aircraft that can navigate through the air flying under its own power.
Alternative fuel vehicle
An alternative fuel vehicle is a motor vehicle that runs on alternative fuel rather than traditional petroleum fuels (petrol or petrodiesel).
See Hydrogen and Alternative fuel vehicle
Aluminium
Aluminium (Aluminum in North American English) is a chemical element; it has symbol Al and atomic number 13. Hydrogen and Aluminium are airship technology, chemical elements and e-number additives.
Aluminium oxide
Aluminium oxide (or aluminium(III) oxide) is a chemical compound of aluminium and oxygen with the chemical formula.
See Hydrogen and Aluminium oxide
American Institute of Chemical Engineers
The American Institute of Chemical Engineers (AIChE) is a professional organization for chemical engineers.
See Hydrogen and American Institute of Chemical Engineers
Ammonia
Ammonia is an inorganic chemical compound of nitrogen and hydrogen with the formula. Hydrogen and Ammonia are gaseous signaling molecules and Refrigerants.
Ammonia production
Ammonia production takes place worldwide, mostly in large-scale manufacturing plants that produce 183 million metric tonnes of ammonia (2021) annually.
See Hydrogen and Ammonia production
Ammonium perchlorate composite propellant
Ammonium perchlorate composite propellant (APCP) is a solid rocket propellant.
See Hydrogen and Ammonium perchlorate composite propellant
Amorphous carbon
Amorphous carbon is free, reactive carbon that has no crystalline structure.
See Hydrogen and Amorphous carbon
Amorphous metal
An amorphous metal (also known as metallic glass, glassy metal, or shiny metal) is a solid metallic material, usually an alloy, with disordered atomic-scale structure.
See Hydrogen and Amorphous metal
Amorphous silicon
Amorphous silicon (a-Si) is the non-crystalline form of silicon used for solar cells and thin-film transistors in LCDs.
See Hydrogen and Amorphous silicon
Anaerobic corrosion
Anaerobic corrosion (also known as hydrogen corrosion) is a form of metal corrosion occurring in anoxic water.
See Hydrogen and Anaerobic corrosion
Angular momentum
Angular momentum (sometimes called moment of momentum or rotational momentum) is the rotational analog of linear momentum.
See Hydrogen and Angular momentum
Anoxic waters
Anoxic waters are areas of sea water, fresh water, or groundwater that are depleted of dissolved oxygen.
See Hydrogen and Anoxic waters
Antihydrogen
Antihydrogen is the antimatter counterpart of hydrogen.
Antimatter
In modern physics, antimatter is defined as matter composed of the antiparticles (or "partners") of the corresponding particles in "ordinary" matter, and can be thought of as matter with reversed charge, parity, and time, known as CPT reversal.
Antiproton
The antiproton,, (pronounced p-bar) is the antiparticle of the proton.
Antoine Lavoisier
Antoine-Laurent de Lavoisier (26 August 17438 May 1794), CNRS (Centre National de la Recherche Scientifique) also Antoine Lavoisier after the French Revolution, was a French nobleman and chemist who was central to the 18th-century chemical revolution and who had a large influence on both the history of chemistry and the history of biology.
See Hydrogen and Antoine Lavoisier
Aqueous solution
An aqueous solution is a solution in which the solvent is water.
See Hydrogen and Aqueous solution
Asphyxiant gas
An asphyxiant gas, also known as a simple asphyxiant, is a nontoxic or minimally toxic gas which reduces or displaces the normal oxygen concentration in breathing air.
See Hydrogen and Asphyxiant gas
Atmospheric escape
Atmospheric escape is the loss of planetary atmospheric gases to outer space.
See Hydrogen and Atmospheric escape
Atom
Atoms are the basic particles of the chemical elements.
Atomic hydrogen welding
Atomic hydrogen welding (AHW or Athydo) is an arc welding process that uses an arc between two tungsten electrodes in a shielding atmosphere of hydrogen.
See Hydrogen and Atomic hydrogen welding
Atomic nucleus
The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment.
See Hydrogen and Atomic nucleus
Atomic number
The atomic number or nuclear charge number (symbol Z) of a chemical element is the charge number of an atomic nucleus.
See Hydrogen and Atomic number
Atomic orbital
In quantum mechanics, an atomic orbital is a function describing the location and wave-like behavior of an electron in an atom.
See Hydrogen and Atomic orbital
Aurora
An aurora (aurorae or auroras), also commonly known as the northern lights (aurora borealis) or southern lights (aurora australis), is a natural light display in Earth's sky, predominantly seen in high-latitude regions (around the Arctic and Antarctic).
Autoignition temperature
The autoignition temperature or self-ignition temperature, often called spontaneous ignition temperature or minimum ignition temperature (or shortly ignition temperature) and formerly also known as kindling point, of a substance is the lowest temperature in which it spontaneously ignites in a normal atmosphere without an external source of ignition, such as a flame or spark.
See Hydrogen and Autoignition temperature
Balloon
A balloon is a flexible membrane bag that can be inflated with a gas, such as helium, hydrogen, nitrous oxide, oxygen, or air.
Baryon
In particle physics, a baryon is a type of composite subatomic particle, including the proton and the neutron, that contains an odd number of valence quarks, conventionally three.
BASF
BASF SE, an initialism of its original name, is a European multinational company and the largest chemical producer in the world.
Battery electric vehicle
A battery electric vehicle (BEV), pure electric vehicle, only-electric vehicle, fully electric vehicle or all-electric vehicle is a type of electric vehicle (EV) that exclusively uses chemical energy stored in rechargeable battery packs, with no secondary source of propulsion (a hydrogen fuel cell, internal combustion engine, etc.).
See Hydrogen and Battery electric vehicle
BBC
The British Broadcasting Corporation (BBC) is a British public service broadcaster headquartered at Broadcasting House in London, England.
See Hydrogen and BBC
BBC Four
BBC Four is a British free-to-air public broadcast television channel owned and operated by the BBC.
Beta decay
In nuclear physics, beta decay (β-decay) is a type of radioactive decay in which an atomic nucleus emits a beta particle (fast energetic electron or positron), transforming into an isobar of that nuclide.
Beta particle
A beta particle, also called beta ray or beta radiation (symbol β), is a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay.
See Hydrogen and Beta particle
Big Bang
The Big Bang is a physical theory that describes how the universe expanded from an initial state of high density and temperature.
Biochemistry
Biochemistry or biological chemistry is the study of chemical processes within and relating to living organisms.
Biohydrogen
Biohydrogen is H2 that is produced biologically.
Birkeland current
A Birkeland current (also known as field-aligned current) is a set of electrical currents that flow along geomagnetic field lines connecting the Earth's magnetosphere to the Earth's high latitude ionosphere.
See Hydrogen and Birkeland current
Bohr model
In atomic physics, the Bohr model or Rutherford–Bohr model is an obsolete model of the atom, presented by Niels Bohr and Ernest Rutherford in 1913.
Bond-dissociation energy
The bond-dissociation energy (BDE, D0, or DH°) is one measure of the strength of a chemical bond.
See Hydrogen and Bond-dissociation energy
Borane
Borane, also known as borine, is an unstable and highly reactive molecule with the chemical formula.
Boron
Boron is a chemical element; it has symbol B and atomic number 5. Hydrogen and Boron are chemical elements.
Boron group
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Brønsted–Lowry acid–base theory
The Brønsted–Lowry theory (also called proton theory of acids and bases) is an acid–base reaction theory which was first developed by Johannes Nicolaus Brønsted and Thomas Martin Lowry independently in 1923.
See Hydrogen and Brønsted–Lowry acid–base theory
Bridging ligand
In coordination chemistry, a bridging ligand is a ligand that connects two or more atoms, usually metal ions.
See Hydrogen and Bridging ligand
Brine
Brine (or briny water) is water with a high-concentration solution of salt (typically sodium chloride or calcium chloride). Hydrogen and brine are Refrigerants.
Cadmium oxide
Cadmium oxide is an inorganic compound with the formula CdO.
See Hydrogen and Cadmium oxide
Calvin cycle
The Calvin cycle, light-independent reactions, bio synthetic phase, dark reactions, or photosynthetic carbon reduction (PCR) cycle of photosynthesis is a series of chemical reactions that convert carbon dioxide and hydrogen-carrier compounds into glucose.
Cambridge University Press
Cambridge University Press is the university press of the University of Cambridge.
See Hydrogen and Cambridge University Press
CANDU reactor
The CANDU (Canada Deuterium Uranium) is a Canadian pressurized heavy-water reactor design used to generate electric power.
See Hydrogen and CANDU reactor
Carbon
Carbon is a chemical element; it has symbol C and atomic number 6. Hydrogen and Carbon are chemical elements and reactive nonmetals.
Carbon Brief
Carbon Brief is a UK-based website specialising in the science and policy of climate change.
Carbon capture and storage
Carbon capture and storage (CCS) is a process in which a relatively pure stream of carbon dioxide (CO2) from industrial sources is separated, treated and transported to a long-term storage location.
See Hydrogen and Carbon capture and storage
Carbon monoxide
Carbon monoxide (chemical formula CO) is a poisonous, flammable gas that is colorless, odorless, tasteless, and slightly less dense than air. Hydrogen and Carbon monoxide are gaseous signaling molecules.
See Hydrogen and Carbon monoxide
Carborane
hydrogen − white,chlorine − green,boron − pink,carbon − black. --> Carboranes (or carbaboranes) are electron-delocalized (non-classically bonded) clusters composed of boron, carbon and hydrogen atoms.
Catalysis
Catalysis is the increase in rate of a chemical reaction due to an added substance known as a catalyst.
Cerium(IV) oxide–cerium(III) oxide cycle
The cerium(IV) oxide–cerium(III) oxide cycle or CeO2/Ce2O3 cycle is a two-step thermochemical process that employs cerium(IV) oxide and cerium(III) oxide for hydrogen production.
See Hydrogen and Cerium(IV) oxide–cerium(III) oxide cycle
Chemical bond
A chemical bond is the association of atoms or ions to form molecules, crystals, and other structures.
See Hydrogen and Chemical bond
Chemical compound
A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) containing atoms from more than one chemical element held together by chemical bonds.
See Hydrogen and Chemical compound
Chemical element
A chemical element is a chemical substance that cannot be broken down into other substances by chemical reactions. Hydrogen and chemical element are chemical elements.
See Hydrogen and Chemical element
Chemical formula
A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus (+) and minus (−) signs.
See Hydrogen and Chemical formula
Chemical polarity
In chemistry, polarity is a separation of electric charge leading to a molecule or its chemical groups having an electric dipole moment, with a negatively charged end and a positively charged end.
See Hydrogen and Chemical polarity
Chemical reaction
A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another.
See Hydrogen and Chemical reaction
Chemical symbol
Chemical symbols are the abbreviations used in chemistry, mainly for chemical elements; but also for functional groups, chemical compounds, and other entities. Hydrogen and chemical symbol are chemical elements.
See Hydrogen and Chemical symbol
Chlamydomonas reinhardtii
Chlamydomonas reinhardtii is a single-cell green alga about 10 micrometres in diameter that swims with two flagella.
See Hydrogen and Chlamydomonas reinhardtii
Chlorine
Chlorine is a chemical element; it has symbol Cl and atomic number 17. Hydrogen and Chlorine are chemical elements, Diatomic nonmetals and reactive nonmetals.
Chloroplast
A chloroplast is a type of membrane-bound organelle known as a plastid that conducts photosynthesis mostly in plant and algal cells.
Chronology of the universe
The chronology of the universe describes the history and future of the universe according to Big Bang cosmology.
See Hydrogen and Chronology of the universe
Climate change mitigation
Climate change mitigation (or decarbonisation) is action to limit the greenhouse gases in the atmosphere that cause climate change.
See Hydrogen and Climate change mitigation
CNO cycle
The CNO cycle (for carbon–nitrogen–oxygen; sometimes called Bethe–Weizsäcker cycle after Hans Albrecht Bethe and Carl Friedrich von Weizsäcker) is one of the two known sets of fusion reactions by which stars convert hydrogen to helium, the other being the proton–proton chain reaction (p–p cycle), which is more efficient at the Sun's core temperature.
Coke (fuel)
Coke is a grey, hard, and porous coal-based fuel with a high carbon content.
Columbia University
Columbia University, officially Columbia University in the City of New York, is a private Ivy League research university in New York City.
See Hydrogen and Columbia University
Combined cycle hydrogen power plant
A combined cycle hydrogen power plant is a power plant that uses hydrogen in a combined cycle power plant.
See Hydrogen and Combined cycle hydrogen power plant
Combustibility and flammability
A combustible material is a material that can burn (i.e., sustain a flame) in air under certain conditions.
See Hydrogen and Combustibility and flammability
Computers & Chemical Engineering
Computers & Chemical Engineering is an international, peer-reviewed scientific journal in the field of process systems engineering.
See Hydrogen and Computers & Chemical Engineering
Coolant
A coolant is a substance, typically liquid, that is used to reduce or regulate the temperature of a system.
Coordination complex
A coordination complex is a chemical compound consisting of a central atom or ion, which is usually metallic and is called the coordination centre, and a surrounding array of bound molecules or ions, that are in turn known as ligands or complexing agents.
See Hydrogen and Coordination complex
Copper–chlorine cycle
The copper–chlorine cycle (Cu–Cl cycle) is a four-step thermochemical cycle for the production of hydrogen.
See Hydrogen and Copper–chlorine cycle
Cosmic ray
Cosmic rays or astroparticles are high-energy particles or clusters of particles (primarily represented by protons or atomic nuclei) that move through space at nearly the speed of light.
Covalent bond
A covalent bond is a chemical bond that involves the sharing of electrons to form electron pairs between atoms.
See Hydrogen and Covalent bond
Cracking (chemistry)
In petrochemistry, petroleum geology and organic chemistry, cracking is the process whereby complex organic molecules such as kerogens or long-chain hydrocarbons are broken down into simpler molecules such as light hydrocarbons, by the breaking of carbon–carbon bonds in the precursors.
See Hydrogen and Cracking (chemistry)
Cryogenic fuel
Cryogenic fuels are fuels that require storage at extremely low temperatures in order to maintain them in a liquid state.
See Hydrogen and Cryogenic fuel
Cryogenics
In physics, cryogenics is the production and behaviour of materials at very low temperatures.
Crystal structure
In crystallography, crystal structure is a description of ordered arrangement of atoms, ions, or molecules in a crystalline material.
See Hydrogen and Crystal structure
Cyanobacteria
Cyanobacteria, also called Cyanobacteriota or Cyanophyta, are a phylum of autotrophic gram-negative bacteria that can obtain biological energy via oxygenic photosynthesis.
See Hydrogen and Cyanobacteria
Damped Lyman-alpha system
Damped Lyman alpha systems or Damped Lyman alpha absorption systems is a term used by astronomers for concentrations of neutral hydrogen gas that are detected in the spectra of quasars – a class of distant Active Galactic Nuclei.
See Hydrogen and Damped Lyman-alpha system
Dark energy
In physical cosmology and astronomy, dark energy is an unknown form of energy that affects the universe on the largest scales.
Dark matter
In astronomy, dark matter is a hypothetical form of matter that appears not to interact with light or the electromagnetic field.
Dayton, Ohio
Dayton is a city in Montgomery and Greene counties and the county seat of Montgomery County, Ohio, United States.
Döbereiner's lamp
Döbereiner's lamp, also called a "tinderbox" ("Feuerzeug"), is a lighter invented in 1823 by the German chemist Johann Wolfgang Döbereiner.
See Hydrogen and Döbereiner's lamp
De Rivaz engine
The de Rivaz engine was a pioneering reciprocating engine designed and developed from 1804 by the Franco-Swiss inventor Isaac de Rivaz.
See Hydrogen and De Rivaz engine
Density
Density (volumetric mass density or specific mass) is a substance's mass per unit of volume.
Detonation
Detonation is a type of combustion involving a supersonic exothermic front accelerating through a medium that eventually drives a shock front propagating directly in front of it.
Deuterium
Deuterium (hydrogen-2, symbol H or D, also known as heavy hydrogen) is one of two stable isotopes of hydrogen (the other is protium, or hydrogen-1).
Diatomic molecule
Diatomic molecules are molecules composed of only two atoms, of the same or different chemical elements.
See Hydrogen and Diatomic molecule
Dihydrogen cation
The dihydrogen cation or hydrogen molecular ion is a cation (positive ion) with formula.
See Hydrogen and Dihydrogen cation
Dirac equation
In particle physics, the Dirac equation is a relativistic wave equation derived by British physicist Paul Dirac in 1928.
See Hydrogen and Dirac equation
Edward Daniel Clarke
Edward Daniel Clarke (5 June 17699 March 1822) was an English clergyman, naturalist, mineralogist, and traveller.
See Hydrogen and Edward Daniel Clarke
Electric arc furnace
An electric arc furnace (EAF) is a furnace that heats material by means of an electric arc.
See Hydrogen and Electric arc furnace
Electric charge
Electric charge (symbol q, sometimes Q) is the physical property of matter that causes it to experience a force when placed in an electromagnetic field.
See Hydrogen and Electric charge
Electric-field screening
In physics, screening is the damping of electric fields caused by the presence of mobile charge carriers.
See Hydrogen and Electric-field screening
Electrolysis
In chemistry and manufacturing, electrolysis is a technique that uses direct electric current (DC) to drive an otherwise non-spontaneous chemical reaction.
Electrolysis of water
Electrolysis of water is using electricity to split water into oxygen and hydrogen gas by electrolysis.
See Hydrogen and Electrolysis of water
Electromagnetism
In physics, electromagnetism is an interaction that occurs between particles with electric charge via electromagnetic fields.
See Hydrogen and Electromagnetism
Electron
The electron (or in nuclear reactions) is a subatomic particle with a negative one elementary electric charge.
Electron donor
In chemistry, an electron donor is a chemical entity that transfers electrons to another compound.
See Hydrogen and Electron donor
Electronegativity
Electronegativity, symbolized as χ, is the tendency for an atom of a given chemical element to attract shared electrons (or electron density) when forming a chemical bond.
See Hydrogen and Electronegativity
Electronvolt
In physics, an electronvolt (symbol eV), also written electron-volt and electron volt, is the measure of an amount of kinetic energy gained by a single electron accelerating through an electric potential difference of one volt in vacuum.
Encyclopædia Britannica
The British Encyclopaedia is a general knowledge English-language encyclopaedia.
See Hydrogen and Encyclopædia Britannica
Energy level
A quantum mechanical system or particle that is bound—that is, confined spatially—can only take on certain discrete values of energy, called energy levels.
Energy Research & Social Science
Energy Research & Social Science is a peer-reviewed academic journal covering social science research on energy systems and energy and society, including anthropology, economics, geography, psychology, political science, social policy, sociology, science and technology studies and legal studies.
See Hydrogen and Energy Research & Social Science
Enzyme
Enzymes are proteins that act as biological catalysts by accelerating chemical reactions.
Ernest Rutherford
Ernest Rutherford, 1st Baron Rutherford of Nelson, (30 August 1871 – 19 October 1937) was a New Zealand physicist who was a pioneering researcher in both atomic and nuclear physics.
See Hydrogen and Ernest Rutherford
Ethane
Ethane is a naturally occurring organic chemical compound with chemical formula.
European Union
The European Union (EU) is a supranational political and economic union of member states that are located primarily in Europe.
See Hydrogen and European Union
Excited state
In quantum mechanics, an excited state of a system (such as an atom, molecule or nucleus) is any quantum state of the system that has a higher energy than the ground state (that is, more energy than the absolute minimum).
See Hydrogen and Excited state
Exothermic process
In thermodynamics, an exothermic process is a thermodynamic process or reaction that releases energy from the system to its surroundings, usually in the form of heat, but also in a form of light (e.g. a spark, flame, or flash), electricity (e.g. a battery), or sound (e.g. explosion heard when burning hydrogen).
See Hydrogen and Exothermic process
Exotic atom
An exotic atom is an otherwise normal atom in which one or more sub-atomic particles have been replaced by other particles of the same charge.
Ferdinand von Zeppelin
Count Ferdinand von Zeppelin (Ferdinand Adolf Heinrich August Graf von Zeppelin; 8 July 1838 – 8 March 1917) was a German general and later inventor of the Zeppelin rigid airships.
See Hydrogen and Ferdinand von Zeppelin
Fermentation
Fermentation is a metabolic process that produces chemical changes in organic substances through the action of enzymes.
Flame detector
A flame detector is a sensor designed to detect and respond to the presence of a flame or fire, allowing flame detection.
See Hydrogen and Flame detector
Flatulence
Flatulence is the expulsion of gas from the intestines via the anus, commonly referred to as farting.
Florida Solar Energy Center
The Florida Solar Energy Center (FSEC) is a research institute of the University of Central Florida, located on a 20-acre (.08 km2) research complex on Florida's Space Coast at UCF's Cocoa satellite campus.
See Hydrogen and Florida Solar Energy Center
Fluorine
Fluorine is a chemical element; it has symbol F and atomic number 9. Hydrogen and Fluorine are chemical elements, Diatomic nonmetals and reactive nonmetals.
Forming gas
Forming gas is a mixture of hydrogen (mole fraction varies) and nitrogen.
Fossil fuel
A fossil fuel is a carbon compound- or hydrocarbon-containing material such as coal, oil, and natural gas, formed naturally in the Earth's crust from the remains of prehistoric organisms (animals, plants and planktons), a process that occurs within geological formations.
François Isaac de Rivaz
François Isaac de Rivaz (December 19, 1752, in Paris – July 30, 1828, in Sion) was a French-born Swiss inventor and a politician.
See Hydrogen and François Isaac de Rivaz
France
France, officially the French Republic, is a country located primarily in Western Europe.
Frostbite
Frostbite is a skin injury that occurs when someone is exposed to extremely low temperatures, causing the freezing of the skin or other tissues, commonly affecting the fingers, toes, nose, ears, cheeks and chin areas.
Fuel cell
A fuel cell is an electrochemical cell that converts the chemical energy of a fuel (often hydrogen) and an oxidizing agent (often oxygen) into electricity through a pair of redox reactions.
Fugitive gas emissions
Fugitive gas emissions are emissions of gas (typically natural gas, which contains methane) to atmosphere or groundwater which result from oil and gas or coal mining activity.
See Hydrogen and Fugitive gas emissions
Gallium
Gallium is a chemical element; it has the symbol Ga and atomic number 31. Hydrogen and Gallium are chemical elements.
Gas
Gas is one of the four fundamental states of matter.
See Hydrogen and Gas
Gas giant
A gas giant is a giant planet composed mainly of hydrogen and helium.
Gas venting
Gas venting, more specifically known as natural-gas venting or methane venting, is the intentional and controlled release of gases containing alkane hydrocarbons - predominately methane - into Earth's atmosphere.
Germany
Germany, officially the Federal Republic of Germany (FRG), is a country in Central Europe.
Gilbert N. Lewis
Gilbert Newton Lewis (October 23 or October 25, 1875 – March 23, 1946) was an American physical chemist and a dean of the college of chemistry at University of California, Berkeley.
See Hydrogen and Gilbert N. Lewis
Gravity
In physics, gravity is a fundamental interaction which causes mutual attraction between all things that have mass.
Greece
Greece, officially the Hellenic Republic, is a country in Southeast Europe.
Green hydrogen
Green hydrogen (GH2 or GH2) is hydrogen produced by the electrolysis of water, using renewable electricity.
See Hydrogen and Green hydrogen
Ground state
The ground state of a quantum-mechanical system is its stationary state of lowest energy; the energy of the ground state is known as the zero-point energy of the system.
Groundwater
Groundwater is the water present beneath Earth's surface in rock and soil pore spaces and in the fractures of rock formations.
Haber process
The Haber process, also called the Haber–Bosch process, is the main industrial procedure for the production of ammonia.
See Hydrogen and Haber process
Hafnium(IV) oxide
Hafnium(IV) oxide is the inorganic compound with the formula.
See Hydrogen and Hafnium(IV) oxide
Hafnon
Hafnon is a hafnium nesosilicate mineral, chemical formula or.
Half-life
Half-life (symbol) is the time required for a quantity (of substance) to reduce to half of its initial value.
Halogen
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Harold Urey
Harold Clayton Urey (April 29, 1893 – January 5, 1981) was an American physical chemist whose pioneering work on isotopes earned him the Nobel Prize in Chemistry in 1934 for the discovery of deuterium.
Heat of combustion
The heating value (or energy value or calorific value) of a substance, usually a fuel or food (see food energy), is the amount of heat released during the combustion of a specified amount of it.
See Hydrogen and Heat of combustion
Heavy water
Heavy water (deuterium oxide) is a form of water whose hydrogen atoms are all deuterium (or D, also known as heavy hydrogen) rather than the common hydrogen-1 isotope (also called protium) that makes up most of the hydrogen in normal water.
Helium
Helium (from lit) is a chemical element; it has symbol He and atomic number 2. Hydrogen and Helium are airship technology, chemical elements and e-number additives.
Helium-3
Helium-3 (3He see also helion) is a light, stable isotope of helium with two protons and one neutron.
Henri Giffard
Baptiste Jules Henri Jacques Giffard (8 February 182514 April 1882) was a French engineer.
See Hydrogen and Henri Giffard
Henry Cavendish
Henry Cavendish (10 October 1731 – 24 February 1810) was an English natural philosopher and scientist who was an important experimental and theoretical chemist and physicist.
See Hydrogen and Henry Cavendish
Heteroatom
In chemistry, a heteroatom is, strictly, any atom that is not carbon or hydrogen.
High pressure
In science and engineering the study of high pressure examines its effects on materials and the design and construction of devices, such as a diamond anvil cell, which can create high pressure.
See Hydrogen and High pressure
Hindenburg disaster
The Hindenburg disaster was an airship accident that occurred on May 6, 1937, in Manchester Township, New Jersey, U.S. The LZ 129 ''Hindenburg'' (Luftschiff Zeppelin #129; Registration: D-LZ 129) was a German commercial passenger-carrying rigid airship, the lead ship of the ''Hindenburg'' class, the longest class of flying machine and the largest airship by envelope volume.
See Hydrogen and Hindenburg disaster
Hubble Space Telescope
The Hubble Space Telescope (often referred to as HST or Hubble) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation.
See Hydrogen and Hubble Space Telescope
Hybrid sulfur cycle
The hybrid sulfur cycle (HyS) is a two-step water-splitting process intended to be used for hydrogen production.
See Hydrogen and Hybrid sulfur cycle
Hydride
In chemistry, a hydride is formally the anion of hydrogen (H&minus), a hydrogen atom with two electrons.
Hydrocarbon
In organic chemistry, a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon.
Hydrochloric acid
Hydrochloric acid, also known as muriatic acid or spirits of salt, is an aqueous solution of hydrogen chloride (HCl). Hydrogen and Hydrochloric acid are e-number additives.
See Hydrogen and Hydrochloric acid
Hydrodesulfurization
Hydrodesulfurization (HDS), also called hydrotreatment or hydrotreating, is a catalytic chemical process widely used to remove sulfur (S) from natural gas and from refined petroleum products, such as gasoline or petrol, jet fuel, kerosene, diesel fuel, and fuel oils.
See Hydrogen and Hydrodesulfurization
Hydrogen
Hydrogen is a chemical element; it has symbol H and atomic number 1. Hydrogen and Hydrogen are airship technology, chemical elements, Diatomic nonmetals, e-number additives, gaseous signaling molecules, least dense things, reactive nonmetals and Refrigerants.
Hydrogen atom
A hydrogen atom is an atom of the chemical element hydrogen.
See Hydrogen and Hydrogen atom
Hydrogen bond
In chemistry, a hydrogen bond (or H-bond) is primarily an electrostatic force of attraction between a hydrogen (H) atom which is covalently bonded to a more electronegative "donor" atom or group (Dn), and another electronegative atom bearing a lone pair of electrons—the hydrogen bond acceptor (Ac).
See Hydrogen and Hydrogen bond
Hydrogen breath test
A hydrogen breath test (or HBT) is used as a diagnostic tool for small intestine bacterial overgrowth and carbohydrate malabsorption, such as lactose, fructose, and sorbitol malabsorption.
See Hydrogen and Hydrogen breath test
Hydrogen chloride
The compound hydrogen chloride has the chemical formula and as such is a hydrogen halide.
See Hydrogen and Hydrogen chloride
Hydrogen cycle
The hydrogen cycle consists of hydrogen exchanges between biotic (living) and abiotic (non-living) sources and sinks of hydrogen-containing compounds.
See Hydrogen and Hydrogen cycle
Hydrogen embrittlement
Hydrogen embrittlement (HE), also known as hydrogen-assisted cracking or hydrogen-induced cracking (HIC), is a reduction in the ductility of a metal due to absorbed hydrogen.
See Hydrogen and Hydrogen embrittlement
Hydrogen fluoride
Hydrogen fluoride (fluorane) is an inorganic compound with chemical formula.
See Hydrogen and Hydrogen fluoride
Hydrogen ion
A hydrogen ion is created when a hydrogen atom loses an electron.
Hydrogen line
The hydrogen line, 21 centimeter line, or H I line is a spectral line that is created by a change in the energy state of solitary, electrically neutral hydrogen atoms.
See Hydrogen and Hydrogen line
Hydrogen production
Hydrogen gas is produced by several industrial methods.
See Hydrogen and Hydrogen production
Hydrogen-cooled turbo generator
A hydrogen-cooled turbo generator is a turbo generator with gaseous hydrogen as a coolant.
See Hydrogen and Hydrogen-cooled turbo generator
Hydrogenase
A hydrogenase is an enzyme that catalyses the reversible oxidation of molecular hydrogen (H2), as shown below: Hydrogen uptake is coupled to the reduction of electron acceptors such as oxygen, nitrate, sulfate, carbon dioxide, and fumarate.
Hydrogenation
Hydrogenation is a chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst such as nickel, palladium or platinum.
See Hydrogen and Hydrogenation
Hydrogenolysis
Hydrogenolysis is a chemical reaction whereby a carbon–carbon or carbon–heteroatom single bond is cleaved or undergoes lysis (breakdown) by hydrogen.
See Hydrogen and Hydrogenolysis
Hydronium
In chemistry, hydronium (hydroxonium in traditional British English) is the cation, also written as, the type of oxonium ion produced by protonation of water.
Inch of mercury
Inch of mercury (inHg and ″Hg) is a non-SI unit of measurement for pressure.
See Hydrogen and Inch of mercury
Indium
Indium is a chemical element; it has symbol In and atomic number 49. Hydrogen and Indium are chemical elements.
Inorganic chemistry
Inorganic chemistry deals with synthesis and behavior of inorganic and organometallic compounds.
See Hydrogen and Inorganic chemistry
Inorganic Chemistry (journal)
Inorganic Chemistry is a biweekly peer-reviewed scientific journal published by the American Chemical Society since 1962.
See Hydrogen and Inorganic Chemistry (journal)
International Renewable Energy Agency
The International Renewable Energy Agency (IRENA) is an intergovernmental organization mandated to facilitate cooperation, advance knowledge, and promote the adoption and sustainable use of renewable energy.
See Hydrogen and International Renewable Energy Agency
International Space Station
The International Space Station (ISS) is a large space station assembled and maintained in low Earth orbit by a collaboration of five space agencies and their contractors: NASA (United States), Roscosmos (Russia), ESA (Europe), JAXA (Japan), and CSA (Canada).
See Hydrogen and International Space Station
International Union of Pure and Applied Chemistry
The International Union of Pure and Applied Chemistry (IUPAC) is an international federation of National Adhering Organizations working for the advancement of the chemical sciences, especially by developing nomenclature and terminology.
See Hydrogen and International Union of Pure and Applied Chemistry
Interstellar medium
The interstellar medium (ISM) is the matter and radiation that exists in the space between the star systems in a galaxy.
See Hydrogen and Interstellar medium
Ion
An ion is an atom or molecule with a net electrical charge.
See Hydrogen and Ion
IPCC Sixth Assessment Report
The Sixth Assessment Report (AR6) of the United Nations (UN) Intergovernmental Panel on Climate Change (IPCC) is the sixth in a series of reports which assess the available scientific information on climate change.
See Hydrogen and IPCC Sixth Assessment Report
Iron
Iron is a chemical element. Hydrogen and Iron are chemical elements.
Iron oxide
Iron oxides are chemical compounds composed of iron and oxygen.
Iron oxide cycle
For chemical reactions, the iron oxide cycle (Fe3O4/FeO) is the original two-step thermochemical cycle proposed for use for hydrogen production.
See Hydrogen and Iron oxide cycle
Iron(II) hydroxide
Iron(II) hydroxide or ferrous hydroxide is an inorganic compound with the formula Fe(OH)2.
See Hydrogen and Iron(II) hydroxide
Iron(III) oxide
Iron(III) oxide or ferric oxide is the inorganic compound with the formula Fe2O3. Hydrogen and Iron(III) oxide are e-number additives.
See Hydrogen and Iron(III) oxide
Isotope geochemistry
Isotope geochemistry is an aspect of geology based upon the study of natural variations in the relative abundances of isotopes of various elements.
See Hydrogen and Isotope geochemistry
Isotopes of hydrogen
Hydrogen (1H) has three naturally occurring isotopes, sometimes denoted,, and.
See Hydrogen and Isotopes of hydrogen
IUPAC nomenclature of chemistry
The International Union of Pure and Applied Chemistry (IUPAC) has published four sets of rules to standardize chemical nomenclature.
See Hydrogen and IUPAC nomenclature of chemistry
Jacques Charles
Jacques Alexandre César Charles (12 November 1746 – 7 April 1823) was a French inventor, scientist, mathematician, and balloonist.
See Hydrogen and Jacques Charles
James Dewar
Sir James Dewar (20 September 1842 – 27 March 1923) was a British chemist and physicist.
Japan
Japan is an island country in East Asia, located in the Pacific Ocean off the northeast coast of the Asian mainland.
John A. Peacock
John Andrew Peacock, FRS, FRSE (born 27 March 1956) is a British cosmologist, astronomer, and academic.
See Hydrogen and John A. Peacock
Journal of Biomolecular NMR
The Journal of Biomolecular NMR publishes research on technical developments and innovative applications of nuclear magnetic resonance spectroscopy for the study of structure and dynamic properties of biopolymers in solution, liquid crystals, solids and mixed environments.
See Hydrogen and Journal of Biomolecular NMR
Jupiter
Jupiter is the fifth planet from the Sun and the largest in the Solar System.
Keith Olive
Keith Alison Olive is a theoretical physicist, and director at the William I Fine Theoretical Physics Institute, University of Minnesota, specializing in particle physics and cosmology.
Kinetic isotope effect
In physical organic chemistry, a kinetic isotope effect (KIE) is the change in the reaction rate of a chemical reaction when one of the atoms in the reactants is replaced by one of its isotopes.
See Hydrogen and Kinetic isotope effect
Kipp's apparatus
Kipp's apparatus, also called a Kipp generator, is an apparatus designed for preparation of small volumes of gases.
See Hydrogen and Kipp's apparatus
Lanthanum aluminate
Lanthanum aluminate is an inorganic compound with the formula LaAlO3, often abbreviated as LAO.
See Hydrogen and Lanthanum aluminate
Lanthanum oxide
Lanthanum(III) oxide, also known as lanthana, chemical formula, is an inorganic compound containing the rare earth element lanthanum and oxygen.
See Hydrogen and Lanthanum oxide
Large intestine
The large intestine, also known as the large bowel, is the last part of the gastrointestinal tract and of the digestive system in tetrapods.
See Hydrogen and Large intestine
Lawrence Berkeley National Laboratory
Lawrence Berkeley National Laboratory (LBNL) is a federally funded research and development center in the hills of Berkeley, California, United States.
See Hydrogen and Lawrence Berkeley National Laboratory
Leak detection
Pipeline leak detection is used to determine if (and in some cases where) a leak has occurred in systems which contain liquids and gases.
See Hydrogen and Leak detection
Lifting gas
A lifting gas or lighter-than-air gas is a gas that has a density lower than normal atmospheric gases and rises above them as a result, making it useful in lifting lighter-than-air aircraft. Hydrogen and lifting gas are airship technology.
Light-dependent reactions
Light-dependent reactions are certain photochemical reactions involved in photosynthesis, the main process by which plants acquire energy.
See Hydrogen and Light-dependent reactions
Limelight
Limelight (also known as Drummond light or calcium light)James R. Smith (2004).
Liquefaction
In materials science, liquefaction is a process that generates a liquid from a solid or a gas or that generates a non-liquid phase which behaves in accordance with fluid dynamics.
Liquid hydrogen
Liquid hydrogen is the liquid state of the element hydrogen.
See Hydrogen and Liquid hydrogen
Liquid oxygen
Liquid oxygen, sometimes abbreviated as LOX or LOXygen, is a clear light sky-blue liquid form of dioxygen.
See Hydrogen and Liquid oxygen
Liquid-propellant rocket
A liquid-propellant rocket or liquid rocket utilizes a rocket engine burning liquid propellants.
See Hydrogen and Liquid-propellant rocket
Lithium aluminium hydride
Lithium aluminium hydride, commonly abbreviated to LAH, is an inorganic compound with the chemical formula or.
See Hydrogen and Lithium aluminium hydride
Lithium hydride
Lithium hydride is an inorganic compound with the formula LiH.
See Hydrogen and Lithium hydride
Luminous paint
Luminous paint (or luminescent paint) is paint that emits visible light through fluorescence, phosphorescence, or radioluminescence.
See Hydrogen and Luminous paint
LZ 129 Hindenburg
LZ 129 Hindenburg (Luftschiff Zeppelin #129; Registration: D-LZ 129) was a German commercial passenger-carrying rigid airship, the lead ship of the ''Hindenburg'' class, the longest class of flying machine and the largest airship by envelope volume.
See Hydrogen and LZ 129 Hindenburg
Magnesium oxide
Magnesium oxide (MgO), or magnesia, is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium (see also oxide). Hydrogen and magnesium oxide are e-number additives.
See Hydrogen and Magnesium oxide
Magnetite
Magnetite is a mineral and one of the main iron ores, with the chemical formula.
Magnetosphere
In astronomy and planetary science, a magnetosphere is a region of space surrounding an astronomical object in which charged particles are affected by that object's magnetic field.
See Hydrogen and Magnetosphere
Margarine
Margarine (also) is a spread used for flavoring, baking, and cooking.
Mark Oliphant
Sir Marcus Laurence Elwin Oliphant, (8 October 1901 – 14 July 2000) was an Australian physicist and humanitarian who played an important role in the first experimental demonstration of nuclear fusion and in the development of nuclear weapons.
See Hydrogen and Mark Oliphant
Mars Global Surveyor
Mars Global Surveyor (MGS) was an American robotic space probe developed by NASA's Jet Propulsion Laboratory and launched November 1996.
See Hydrogen and Mars Global Surveyor
Mass
Mass is an intrinsic property of a body.
Matter
In classical physics and general chemistry, matter is any substance that has mass and takes up space by having volume.
Metal
A metal is a material that, when polished or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well.
Metallic hydrogen
Metallic hydrogen is a phase of hydrogen in which it behaves like an electrical conductor.
See Hydrogen and Metallic hydrogen
Metalloid
A metalloid is a chemical element which has a preponderance of properties in between, or that are a mixture of, those of metals and nonmetals.
Methane
Methane is a chemical compound with the chemical formula (one carbon atom bonded to four hydrogen atoms). Hydrogen and Methane are gaseous signaling molecules.
Methanol
Methanol (also called methyl alcohol and wood spirit, amongst other names) is an organic chemical compound and the simplest aliphatic alcohol, with the chemical formula (a methyl group linked to a hydroxyl group, often abbreviated as MeOH).
Metre
The metre (or meter in US spelling; symbol: m) is the base unit of length in the International System of Units (SI).
Microorganism
A microorganism, or microbe, is an organism of microscopic size, which may exist in its single-celled form or as a colony of cells. The possible existence of unseen microbial life was suspected from ancient times, such as in Jain scriptures from sixth century BC India. The scientific study of microorganisms began with their observation under the microscope in the 1670s by Anton van Leeuwenhoek.
See Hydrogen and Microorganism
Microsecond
A microsecond is a unit of time in the International System of Units (SI) equal to one millionth (0.000001 or 10−6 or) of a second.
Molecular cloud
A molecular cloud, sometimes called a stellar nursery (if star formation is occurring within), is a type of interstellar cloud, the density and size of which permit absorption nebulae, the formation of molecules (most commonly molecular hydrogen, H2), and the formation of H II regions.
See Hydrogen and Molecular cloud
Molecular geometry
Molecular geometry is the three-dimensional arrangement of the atoms that constitute a molecule.
See Hydrogen and Molecular geometry
Muon
A muon (from the Greek letter mu (μ) used to represent it) is an elementary particle similar to the electron, with an electric charge of −1 e and spin-1/2, but with a much greater mass.
Muonium
Muonium is an exotic atom made up of an antimuon and an electron, which was discovered in 1960 by Vernon W. Hughes and is given the chemical symbol Mu.
Mycobacterium smegmatis
Mycobacterium smegmatis is an acid-fast bacterial species in the phylum Actinomycetota and the genus Mycobacterium.
See Hydrogen and Mycobacterium smegmatis
NASA
The National Aeronautics and Space Administration (NASA) is an independent agency of the U.S. federal government responsible for the civil space program, aeronautics research, and space research.
National Academies Press
The US National Academies Press (NAP) was created to publish the reports issued by the National Academies of Sciences, Engineering, and Medicine, the National Academy of Engineering, the National Academy of Medicine, and the National Research Council.
See Hydrogen and National Academies Press
Natural abundance
In physics, natural abundance (NA) refers to the abundance of isotopes of a chemical element as naturally found on a planet.
See Hydrogen and Natural abundance
Natural gas
Natural gas (also called fossil gas, methane gas or simply gas) is a naturally occurring mixture of gaseous hydrocarbons consisting primarily of methane (95%) in addition to various smaller amounts of other higher alkanes.
Natural hydrogen
Natural hydrogen (known as white hydrogen, geologic hydrogen or gold hydrogen), is hydrogen that is formed by natural processes (as opposed to hydrogen produced in a laboratory or in industry).
See Hydrogen and Natural hydrogen
Neutron
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Neutron moderator
In nuclear engineering, a neutron moderator is a medium that reduces the speed of fast neutrons, ideally without capturing any, leaving them as thermal neutrons with only minimal (thermal) kinetic energy.
See Hydrogen and Neutron moderator
New Jersey
New Jersey is a state situated within both the Mid-Atlantic and Northeastern regions of the United States.
Nickel
Nickel is a chemical element; it has symbol Ni and atomic number 28. Hydrogen and Nickel are chemical elements.
Nickel–hydrogen battery
A nickel–hydrogen battery (NiH2 or Ni–H2) is a rechargeable electrochemical power source based on nickel and hydrogen.
See Hydrogen and Nickel–hydrogen battery
Nitrogen
Nitrogen is a chemical element; it has symbol N and atomic number 7. Hydrogen and Nitrogen are chemical elements, Diatomic nonmetals, e-number additives and reactive nonmetals.
Nonmetallic material
Nonmetallic material, or in nontechnical terms a nonmetal, refers to materials which are not metals.
See Hydrogen and Nonmetallic material
NOx
In atmospheric chemistry, is shorthand for nitric oxide and nitrogen dioxide, the nitrogen oxides that are most relevant for air pollution.
See Hydrogen and NOx
Nuclear fusion
Nuclear fusion is a reaction in which two or more atomic nuclei, usually deuterium and tritium (hydrogen isotopes), combine to form one or more different atomic nuclei and subatomic particles (neutrons or protons).
See Hydrogen and Nuclear fusion
Nuclear magnetic resonance spectroscopy
Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy or magnetic resonance spectroscopy (MRS), is a spectroscopic technique based on re-orientation of atomic nuclei with non-zero nuclear spins in an external magnetic field.
See Hydrogen and Nuclear magnetic resonance spectroscopy
Nuclear reactor
A nuclear reactor is a device used to initiate and control a fission nuclear chain reaction or nuclear fusion reactions.
See Hydrogen and Nuclear reactor
Nuclear weapons testing
Nuclear weapons tests are experiments carried out to determine the performance, yield, and effects of nuclear weapons and have resulted until 2020 in up to 2.4 million people dying from its global fallout.
See Hydrogen and Nuclear weapons testing
Ore
Ore is natural rock or sediment that contains one or more valuable minerals concentrated above background levels, typically containing metals, that can be mined, treated and sold at a profit.
See Hydrogen and Ore
Organic chemistry
Organic chemistry is a subdiscipline within chemistry involving the scientific study of the structure, properties, and reactions of organic compounds and organic materials, i.e., matter in its various forms that contain carbon atoms.
See Hydrogen and Organic chemistry
Organic compound
Some chemical authorities define an organic compound as a chemical compound that contains a carbon–hydrogen or carbon–carbon bond; others consider an organic compound to be any chemical compound that contains carbon.
See Hydrogen and Organic compound
Organism
An organism is defined in a medical dictionary as any living thing that functions as an individual.
Oxonium ion
In chemistry, an oxonium ion is any cation containing an oxygen atom that has three bonds and 1+ formal charge.
Oxygen
Oxygen is a chemical element; it has symbol O and atomic number 8. Hydrogen and Oxygen are chemical elements, Diatomic nonmetals, e-number additives and reactive nonmetals.
Oxyhydrogen
Oxyhydrogen is a mixture of hydrogen (H2) and oxygen (O2) gases.
Palladium
Palladium is a chemical element; it has symbol Pd and atomic number 46. Hydrogen and Palladium are chemical elements.
Particle Data Group
The Particle Data Group (PDG) is an international collaboration of particle physicists that compiles and reanalyzes published results related to the properties of particles and fundamental interactions.
See Hydrogen and Particle Data Group
Parts-per notation
In science and engineering, the parts-per notation is a set of pseudo-units to describe small values of miscellaneous dimensionless quantities, e.g. mole fraction or mass fraction.
See Hydrogen and Parts-per notation
Path integral formulation
The path integral formulation is a description in quantum mechanics that generalizes the stationary action principle of classical mechanics.
See Hydrogen and Path integral formulation
Paul Harteck
Paul Karl Maria Harteck (20 July 190222 January 1985) was an Austrian physical chemist.
Periodic Videos
Periodic Videos (also known as The Periodic Table of Videos) is a video project and YouTube channel on chemistry.
See Hydrogen and Periodic Videos
Phlogiston theory
The phlogiston theory, a superseded scientific theory, postulated the existence of a fire-like element dubbed phlogiston contained within combustible bodies and released during combustion.
See Hydrogen and Phlogiston theory
Phosphorus
Phosphorus is a chemical element; it has symbol P and atomic number 15. Hydrogen and Phosphorus are chemical elements and reactive nonmetals.
Photon
A photon is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force.
Photosynthesis
Photosynthesis is a system of biological processes by which photosynthetic organisms, such as most plants, algae, and cyanobacteria, convert light energy, typically from sunlight, into the chemical energy necessary to fuel their metabolism.
See Hydrogen and Photosynthesis
Physical cosmology
Physical cosmology is a branch of cosmology concerned with the study of cosmological models.
See Hydrogen and Physical cosmology
Physical Review
Physical Review is a peer-reviewed scientific journal established in 1893 by Edward Nichols.
See Hydrogen and Physical Review
Physical Review Letters
Physical Review Letters (PRL), established in 1958, is a peer-reviewed, scientific journal that is published 52 times per year by the American Physical Society.
See Hydrogen and Physical Review Letters
Pierre-Simon Laplace
Pierre-Simon, Marquis de Laplace (23 March 1749 – 5 March 1827) was a French scholar whose work was important to the development of engineering, mathematics, statistics, physics, astronomy, and philosophy.
See Hydrogen and Pierre-Simon Laplace
Plasma (physics)
Plasma is one of four fundamental states of matter (the other three being solid, liquid, and gas) characterized by the presence of a significant portion of charged particles in any combination of ions or electrons.
See Hydrogen and Plasma (physics)
Positron
The positron or antielectron is the particle with an electric charge of +1e, a spin of 1/2 (the same as the electron), and the same mass as an electron.
Pressure swing adsorption
Pressure swing adsorption (PSA) is a technique used to separate some gas species from a mixture of gases (typically air) under pressure according to the species' molecular characteristics and affinity for an adsorbent material.
See Hydrogen and Pressure swing adsorption
Probability amplitude
In quantum mechanics, a probability amplitude is a complex number used for describing the behaviour of systems.
See Hydrogen and Probability amplitude
Progress in Materials Science
Progress in Materials Science is a journal publishing review articles covering most areas of materials science, published by the Pergamon imprint of Elsevier.
See Hydrogen and Progress in Materials Science
Propane
Propane is a three-carbon alkane with the molecular formula. Hydrogen and Propane are e-number additives and Refrigerants.
Proton
A proton is a stable subatomic particle, symbol, H+, or 1H+ with a positive electric charge of +1 e (elementary charge).
Proton–proton chain
The proton–proton chain, also commonly referred to as the chain, is one of two known sets of nuclear fusion reactions by which stars convert hydrogen to helium.
See Hydrogen and Proton–proton chain
Pure and Applied Chemistry
Pure and Applied Chemistry is the official journal for the International Union of Pure and Applied Chemistry (IUPAC).
See Hydrogen and Pure and Applied Chemistry
Pyrolysis
Pyrolysis is the process of thermal decomposition of materials at elevated temperatures, often in an inert atmosphere.
Pyruvic acid
Pyruvic acid (IUPAC name: 2-oxopropanoic acid, also called acetoic acid) (CH3COCOOH) is the simplest of the alpha-keto acids, with a carboxylic acid and a ketone functional group.
Quantum mechanics
Quantum mechanics is a fundamental theory that describes the behavior of nature at and below the scale of atoms.
See Hydrogen and Quantum mechanics
Quantum simulator
Quantum simulators permit the study of a quantum system in a programmable fashion.
See Hydrogen and Quantum simulator
R33-class airship
The R.33 class of British rigid airships were built for the Royal Naval Air Service during the First World War, but were not completed until after the end of hostilities, by which time the RNAS had become part of the Royal Air Force.
See Hydrogen and R33-class airship
Radioactive tracer
A radioactive tracer, radiotracer, or radioactive label is a synthetic derivative of a natural compound in which one or more atoms have been replaced by a radionuclide (a radioactive atom).
See Hydrogen and Radioactive tracer
Rare-earth element
The rare-earth elements (REE), also called the rare-earth metals or rare earths or, in context, rare-earth oxides, and sometimes the lanthanides (although scandium and yttrium, which do not belong to this series, are usually included as rare earths), are a set of 17 nearly indistinguishable lustrous silvery-white soft heavy metals.
See Hydrogen and Rare-earth element
Recombination (cosmology)
In cosmology, recombination refers to the epoch during which charged electrons and protons first became bound to form electrically neutral hydrogen atoms.
See Hydrogen and Recombination (cosmology)
Redox
Redox (reduction–oxidation or oxidation–reduction) is a type of chemical reaction in which the oxidation states of the reactants change.
Redshift
In physics, a redshift is an increase in the wavelength, and corresponding decrease in the frequency and photon energy, of electromagnetic radiation (such as light).
Reducing agent
In chemistry, a reducing agent (also known as a reductant, reducer, or electron donor) is a chemical species that "donates" an electron to an (called the,,, or). Examples of substances that are common reducing agents include hydrogen, the alkali metals, formic acid, oxalic acid, and sulfite compounds.
See Hydrogen and Reducing agent
Regenerative cooling
Regenerative cooling is a method of cooling gases in which compressed gas is cooled by allowing it to expand and thereby take heat from the surroundings.
See Hydrogen and Regenerative cooling
Richard Feynman
Richard Phillips Feynman (May 11, 1918 – February 15, 1988) was an American theoretical physicist, known for his work in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, the physics of the superfluidity of supercooled liquid helium, as well as his work in particle physics for which he proposed the parton model.
See Hydrogen and Richard Feynman
RMI (energy organization)
RMI, formerly known as the Rocky Mountain Institute, is a think tank in the United States co-founded by Amory Lovins dedicated to research, publication, consulting, and lecturing in the field of sustainability, with a focus on profitable innovations for energy and resource efficiency.
See Hydrogen and RMI (energy organization)
Robert Boyle
Robert Boyle (25 January 1627 – 31 December 1691) was an Anglo-Irish natural philosopher, chemist, physicist, alchemist and inventor.
Rocket propellant
Rocket propellant is the reaction mass of a rocket.
See Hydrogen and Rocket propellant
Rotational spectroscopy
Rotational spectroscopy is concerned with the measurement of the energies of transitions between quantized rotational states of molecules in the gas phase.
See Hydrogen and Rotational spectroscopy
Rotational–vibrational spectroscopy
Rotational–vibrational spectroscopy is a branch of molecular spectroscopy that is concerned with infrared and Raman spectra of molecules in the gas phase.
See Hydrogen and Rotational–vibrational spectroscopy
RS-25
The RS-25, also known as the Space Shuttle Main Engine (SSME), is a liquid-fuel cryogenic rocket engine that was used on NASA's Space Shuttle and is used on the Space Launch System (SLS).
Salt (chemistry)
In chemistry, a salt or ionic compound is a chemical compound consisting of an assembly of positively charged ions (cations) and negatively charged ions (anions), which results in a compound with no net electric charge (electrically neutral).
See Hydrogen and Salt (chemistry)
Schikorr reaction
The Schikorr reaction formally describes the conversion of the iron(II) hydroxide (Fe(OH)2) into iron(II,III) oxide (Fe3O4).
See Hydrogen and Schikorr reaction
Schrödinger equation
The Schrödinger equation is a partial differential equation that governs the wave function of a quantum-mechanical system.
See Hydrogen and Schrödinger equation
Science (journal)
Science, also widely referred to as Science Magazine, is the peer-reviewed academic journal of the American Association for the Advancement of Science (AAAS) and one of the world's top academic journals.
See Hydrogen and Science (journal)
Shielding gas
Shielding gases are inert or semi-inert gases that are commonly used in several welding processes, most notably gas metal arc welding and gas tungsten arc welding (GMAW and GTAW, more popularly known as MIG (Metal Inert Gas) and TIG (Tungsten Inert Gas), respectively).
See Hydrogen and Shielding gas
Silicon dioxide
Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula, commonly found in nature as quartz. Hydrogen and silicon dioxide are e-number additives.
See Hydrogen and Silicon dioxide
Singlet state
In quantum mechanics, a singlet state usually refers to a system in which all electrons are paired.
See Hydrogen and Singlet state
Sodium hydride
Sodium hydride is the chemical compound with the empirical formula NaH.
See Hydrogen and Sodium hydride
Soil
Soil, also commonly referred to as earth or dirt, is a mixture of organic matter, minerals, gases, liquids, and organisms that together support the life of plants and soil organisms.
Solar wind
The solar wind is a stream of charged particles released from the Sun's outermost atmospheric layer, the corona.
Solid hydrogen
Solid hydrogen is the solid state of the element hydrogen, achieved by decreasing the temperature below hydrogen's melting point of.
See Hydrogen and Solid hydrogen
Solubility
In chemistry, solubility is the ability of a substance, the solute, to form a solution with another substance, the solvent.
Space Shuttle Solid Rocket Booster
The Space Shuttle Solid Rocket Booster (SRB) was the first solid-propellant rocket to be used for primary propulsion on a vehicle used for human spaceflight.
See Hydrogen and Space Shuttle Solid Rocket Booster
Special relativity
In physics, the special theory of relativity, or special relativity for short, is a scientific theory of the relationship between space and time.
See Hydrogen and Special relativity
Specific heat capacity
In thermodynamics, the specific heat capacity (symbol) of a substance is the amount of heat that must be added to one unit of mass of the substance in order to cause an increase of one unit in temperature.
See Hydrogen and Specific heat capacity
Spin (physics)
Spin is an intrinsic form of angular momentum carried by elementary particles, and thus by composite particles such as hadrons, atomic nuclei, and atoms.
See Hydrogen and Spin (physics)
Spin isomers of hydrogen
Molecular hydrogen occurs in two isomeric forms, one with its two proton nuclear spins aligned parallel (orthohydrogen), the other with its two proton spins aligned antiparallel (parahydrogen).
See Hydrogen and Spin isomers of hydrogen
Standard temperature and pressure
Standard temperature and pressure (STP) or Standard conditions for temperature and pressure are various standard sets of conditions for experimental measurements used to allow comparisons to be made between different sets of data.
See Hydrogen and Standard temperature and pressure
Stanford University
Stanford University (officially Leland Stanford Junior University) is a private research university in Stanford, California.
See Hydrogen and Stanford University
Star
A star is a luminous spheroid of plasma held together by self-gravity.
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as "stellar nurseries" or "star-forming regions", collapse and form stars.
See Hydrogen and Star formation
Static electricity
Static electricity is an imbalance of electric charges within or on the surface of a material.
See Hydrogen and Static electricity
Steam reforming
Steam reforming or steam methane reforming (SMR) is a method for producing syngas (hydrogen and carbon monoxide) by reaction of hydrocarbons with water.
See Hydrogen and Steam reforming
Steel
Steel is an alloy of iron and carbon with improved strength and fracture resistance compared to other forms of iron.
Steelmaking
Steelmaking is the process of producing steel from iron ore and/or scrap.
Stoichiometry
Stoichiometry is the relationship between the weights of reactants and products before, during, and following chemical reactions.
See Hydrogen and Stoichiometry
Strontium titanate
Strontium titanate is an oxide of strontium and titanium with the chemical formula SrTiO3.
See Hydrogen and Strontium titanate
Sulfur–iodine cycle
The sulfur–iodine cycle (S–I cycle) is a three-step thermochemical cycle used to produce hydrogen.
See Hydrogen and Sulfur–iodine cycle
Sun
The Sun is the star at the center of the Solar System.
See Hydrogen and Sun
Superconductivity
Superconductivity is a set of physical properties observed in certain materials where electrical resistance vanishes and magnetic fields are expelled from the material.
See Hydrogen and Superconductivity
Syngas
Syngas, or synthesis gas, is a mixture of hydrogen and carbon monoxide, in various ratios.
Synthetic fuel
Synthetic fuel or synfuel is a liquid fuel, or sometimes gaseous fuel, obtained from syngas, a mixture of carbon monoxide and hydrogen, in which the syngas was derived from gasification of solid feedstocks such as coal or biomass or by reforming of natural gas.
See Hydrogen and Synthetic fuel
Technical University of Denmark
The Technical University of Denmark (Danmarks Tekniske Universitet), often simply referred to as DTU, is a polytechnic university and school of engineering.
See Hydrogen and Technical University of Denmark
The New York Times
The New York Times (NYT) is an American daily newspaper based in New York City.
See Hydrogen and The New York Times
Thermal conductivity and resistivity
The thermal conductivity of a material is a measure of its ability to conduct heat.
See Hydrogen and Thermal conductivity and resistivity
Thermonuclear weapon
A thermonuclear weapon, fusion weapon or hydrogen bomb (H bomb) is a second-generation nuclear weapon design.
See Hydrogen and Thermonuclear weapon
Tin(IV) oxide
Tin(IV) oxide, also known as stannic oxide, is the inorganic compound with the formula SnO2.
See Hydrogen and Tin(IV) oxide
Titanium dioxide
Titanium dioxide, also known as titanium(IV) oxide or titania, is the inorganic compound derived from titanium with the chemical formula. Hydrogen and titanium dioxide are e-number additives.
See Hydrogen and Titanium dioxide
Tracer-gas leak testing
A tracer-gas leak testing method is a nondestructive testing method that detects gas leaks.
See Hydrogen and Tracer-gas leak testing
Transition metal
In chemistry, a transition metal (or transition element) is a chemical element in the d-block of the periodic table (groups 3 to 12), though the elements of group 12 (and less often group 3) are sometimes excluded.
See Hydrogen and Transition metal
Triatomic hydrogen
Triatomic hydrogen or H3 is an unstable triatomic molecule containing only hydrogen.
See Hydrogen and Triatomic hydrogen
Trihydrogen cation
The trihydrogen cation or protonated molecular hydrogen (IUPAC name: hydrogenonium ion) is a cation (positive ion) with formula, consisting of three hydrogen nuclei (protons) sharing two electrons.
See Hydrogen and Trihydrogen cation
Triplet state
In quantum mechanics, a triplet state, or spin triplet, is the quantum state of an object such as an electron, atom, or molecule, having a quantum spin S.
See Hydrogen and Triplet state
Tritium
Tritium or hydrogen-3 (symbol T or H) is a rare and radioactive isotope of hydrogen with half-life ~12.3 years.
Tritium radioluminescence
Tritium radioluminescence is the use of gaseous tritium, a radioactive isotope of hydrogen, to create visible light.
See Hydrogen and Tritium radioluminescence
Ultraviolet
Ultraviolet (UV) light is electromagnetic radiation of wavelengths of 10–400 nanometers, shorter than that of visible light, but longer than X-rays.
United States
The United States of America (USA or U.S.A.), commonly known as the United States (US or U.S.) or America, is a country primarily located in North America.
See Hydrogen and United States
Universe
The universe is all of space and time and their contents.
University of Southern Maine
The University of Southern Maine (USM) is a public university with campuses in Portland, Gorham and Lewiston in the U.S. state of Maine.
See Hydrogen and University of Southern Maine
Unsaturated fat
An unsaturated fat is a fat or fatty acid in which there is at least one double bond within the fatty acid chain.
See Hydrogen and Unsaturated fat
Vacuum flask
A vacuum flask (also known as a Dewar flask, Dewar bottle or thermos) is an insulating storage vessel that slows the speed at which its contents change in temperature.
Vacuum polarization
In quantum field theory, and specifically quantum electrodynamics, vacuum polarization describes a process in which a background electromagnetic field produces virtual electron–positron pairs that change the distribution of charges and currents that generated the original electromagnetic field.
See Hydrogen and Vacuum polarization
Variable renewable energy
Variable renewable energy (VRE) or intermittent renewable energy sources (IRES) are renewable energy sources that are not dispatchable due to their fluctuating nature, such as wind power and solar power, as opposed to controllable renewable energy sources, such as dammed hydroelectricity or bioenergy, or relatively constant sources, such as geothermal power.
See Hydrogen and Variable renewable energy
Vegetable oil
Vegetable oils, or vegetable fats, are oils extracted from seeds or from other parts of edible plants.
See Hydrogen and Vegetable oil
Viscosity
The viscosity of a fluid is a measure of its resistance to deformation at a given rate.
Water
Water is an inorganic compound with the chemical formula. Hydrogen and Water are Refrigerants.
Water splitting
Water splitting is the chemical reaction in which water is broken down into oxygen and hydrogen: Efficient and economical water splitting would be a technological breakthrough that could underpin a hydrogen economy.
See Hydrogen and Water splitting
Water table
The water table is the upper surface of the zone of saturation.
Water–gas shift reaction
The water–gas shift reaction (WGSR) describes the reaction of carbon monoxide and water vapor to form carbon dioxide and hydrogen: The water gas shift reaction was discovered by Italian physicist Felice Fontana in 1780.
See Hydrogen and Water–gas shift reaction
Welding
Welding is a fabrication process that joins materials, usually metals or thermoplastics, primarily by using high temperature to melt the parts together and allow them to cool, causing fusion.
Wiley-Blackwell
Wiley-Blackwell is an international scientific, technical, medical, and scholarly publishing business of John Wiley & Sons.
See Hydrogen and Wiley-Blackwell
Yttrium(III) oxide
Yttrium oxide, also known as yttria, is Y2O3.
See Hydrogen and Yttrium(III) oxide
Zeppelin
A Zeppelin is a type of rigid airship named after the German inventor Ferdinand von Zeppelin who pioneered rigid airship development at the beginning of the 20th century.
Zinc oxide
Zinc oxide is an inorganic compound with the formula.
Zinc–zinc oxide cycle
For chemical reactions, the zinc–zinc oxide cycle or Zn–ZnO cycle is a two step thermochemical cycle based on zinc and zinc oxide for hydrogen production with a typical efficiency around 40%.
See Hydrogen and Zinc–zinc oxide cycle
Zircon
Zircon is a mineral belonging to the group of nesosilicates and is a source of the metal zirconium.
Zirconium
Zirconium is a chemical element; it has symbol Zr and atomic number 40. Hydrogen and Zirconium are chemical elements.
Zirconium dioxide
Zirconium dioxide, sometimes known as zirconia (not to be confused with zircon), is a white crystalline oxide of zirconium.
See Hydrogen and Zirconium dioxide
2001 Mars Odyssey
2001 Mars Odyssey is a robotic spacecraft orbiting the planet Mars.
See Hydrogen and 2001 Mars Odyssey
See also
Airship technology
- Airship hangar
- Aluminium
- Aramid
- Ballonet
- Balloon (aeronautics)
- Blau gas
- Buoyancy compensator (aviation)
- Cardington Airfield
- Geodetic airframe
- Goldbeater's skin
- Helium
- Hot air balloon
- Hydrogen
- Lamination
- Lifting gas
- Monocoque
- Mooring mast
- Polyester
- Polyvinyl fluoride
- Spy basket
- Thrust vectoring
- Truss
- Vacuum airship
Diatomic nonmetals
Gaseous signaling molecules
- Ammonia
- Biological functions of hydrogen sulfide
- Biological functions of nitric oxide
- Carbon dioxide
- Carbon monoxide
- Carbon suboxide
- CooA
- Ethylene (plant hormone)
- Ethylene oxide
- Ethylene signaling pathway
- Gaseous signaling molecules
- Gasotransmitter
- Hydrogen
- Hydrogen cyanide
- Hydrogen sulfide
- Methane
- Nitric oxide
- Nitrous oxide
- Sulfur dioxide
Least dense things
Reactive nonmetals
References
Also known as 1st element of the periodic table, Applications of hydrogen, Atomic number 1, Compressed Gaseous Hydrogen, Dihydro, Dihydrogen, Diprotium, E949, Element 1, Gaseous hydrogen, H (element), Hidrogen, History of hydrogen, Hydrogen applications, Hydrogen gas, Hydrogen molecule, Hydrogen position in periodic table, Hydrogen uses, Hydrogen, 1H, Inflammable air, Molecular hydrogen, Monatomic hydrogen, Properties of hydrogen, Uses of hydrogen.
, Brønsted–Lowry acid–base theory, Bridging ligand, Brine, Cadmium oxide, Calvin cycle, Cambridge University Press, CANDU reactor, Carbon, Carbon Brief, Carbon capture and storage, Carbon monoxide, Carborane, Catalysis, Cerium(IV) oxide–cerium(III) oxide cycle, Chemical bond, Chemical compound, Chemical element, Chemical formula, Chemical polarity, Chemical reaction, Chemical symbol, Chlamydomonas reinhardtii, Chlorine, Chloroplast, Chronology of the universe, Climate change mitigation, CNO cycle, Coke (fuel), Columbia University, Combined cycle hydrogen power plant, Combustibility and flammability, Computers & Chemical Engineering, Coolant, Coordination complex, Copper–chlorine cycle, Cosmic ray, Covalent bond, Cracking (chemistry), Cryogenic fuel, Cryogenics, Crystal structure, Cyanobacteria, Damped Lyman-alpha system, Dark energy, Dark matter, Dayton, Ohio, Döbereiner's lamp, De Rivaz engine, Density, Detonation, Deuterium, Diatomic molecule, Dihydrogen cation, Dirac equation, Edward Daniel Clarke, Electric arc furnace, Electric charge, Electric-field screening, Electrolysis, Electrolysis of water, Electromagnetism, Electron, Electron donor, Electronegativity, Electronvolt, Encyclopædia Britannica, Energy level, Energy Research & Social Science, Enzyme, Ernest Rutherford, Ethane, European Union, Excited state, Exothermic process, Exotic atom, Ferdinand von Zeppelin, Fermentation, Flame detector, Flatulence, Florida Solar Energy Center, Fluorine, Forming gas, Fossil fuel, François Isaac de Rivaz, France, Frostbite, Fuel cell, Fugitive gas emissions, Gallium, Gas, Gas giant, Gas venting, Germany, Gilbert N. Lewis, Gravity, Greece, Green hydrogen, Ground state, Groundwater, Haber process, Hafnium(IV) oxide, Hafnon, Half-life, Halogen, Harold Urey, Heat of combustion, Heavy water, Helium, Helium-3, Henri Giffard, Henry Cavendish, Heteroatom, High pressure, Hindenburg disaster, Hubble Space Telescope, Hybrid sulfur cycle, Hydride, Hydrocarbon, Hydrochloric acid, Hydrodesulfurization, Hydrogen, Hydrogen atom, Hydrogen bond, Hydrogen breath test, Hydrogen chloride, Hydrogen cycle, Hydrogen embrittlement, Hydrogen fluoride, Hydrogen ion, Hydrogen line, Hydrogen production, Hydrogen-cooled turbo generator, Hydrogenase, Hydrogenation, Hydrogenolysis, Hydronium, Inch of mercury, Indium, Inorganic chemistry, Inorganic Chemistry (journal), International Renewable Energy Agency, International Space Station, International Union of Pure and Applied Chemistry, Interstellar medium, Ion, IPCC Sixth Assessment Report, Iron, Iron oxide, Iron oxide cycle, Iron(II) hydroxide, Iron(III) oxide, Isotope geochemistry, Isotopes of hydrogen, IUPAC nomenclature of chemistry, Jacques Charles, James Dewar, Japan, John A. Peacock, Journal of Biomolecular NMR, Jupiter, Keith Olive, Kinetic isotope effect, Kipp's apparatus, Lanthanum aluminate, Lanthanum oxide, Large intestine, Lawrence Berkeley National Laboratory, Leak detection, Lifting gas, Light-dependent reactions, Limelight, Liquefaction, Liquid hydrogen, Liquid oxygen, Liquid-propellant rocket, Lithium aluminium hydride, Lithium hydride, Luminous paint, LZ 129 Hindenburg, Magnesium oxide, Magnetite, Magnetosphere, Margarine, Mark Oliphant, Mars Global Surveyor, Mass, Matter, Metal, Metallic hydrogen, Metalloid, Methane, Methanol, Metre, Microorganism, Microsecond, Molecular cloud, Molecular geometry, Muon, Muonium, Mycobacterium smegmatis, NASA, National Academies Press, Natural abundance, Natural gas, Natural hydrogen, Neutron, Neutron moderator, New Jersey, Nickel, Nickel–hydrogen battery, Nitrogen, Nonmetallic material, NOx, Nuclear fusion, Nuclear magnetic resonance spectroscopy, Nuclear reactor, Nuclear weapons testing, Ore, Organic chemistry, Organic compound, Organism, Oxonium ion, Oxygen, Oxyhydrogen, Palladium, Particle Data Group, Parts-per notation, Path integral formulation, Paul Harteck, Periodic Videos, Phlogiston theory, Phosphorus, Photon, Photosynthesis, Physical cosmology, Physical Review, Physical Review Letters, Pierre-Simon Laplace, Plasma (physics), Positron, Pressure swing adsorption, Probability amplitude, Progress in Materials Science, Propane, Proton, Proton–proton chain, Pure and Applied Chemistry, Pyrolysis, Pyruvic acid, Quantum mechanics, Quantum simulator, R33-class airship, Radioactive tracer, Rare-earth element, Recombination (cosmology), Redox, Redshift, Reducing agent, Regenerative cooling, Richard Feynman, RMI (energy organization), Robert Boyle, Rocket propellant, Rotational spectroscopy, Rotational–vibrational spectroscopy, RS-25, Salt (chemistry), Schikorr reaction, Schrödinger equation, Science (journal), Shielding gas, Silicon dioxide, Singlet state, Sodium hydride, Soil, Solar wind, Solid hydrogen, Solubility, Space Shuttle Solid Rocket Booster, Special relativity, Specific heat capacity, Spin (physics), Spin isomers of hydrogen, Standard temperature and pressure, Stanford University, Star, Star formation, Static electricity, Steam reforming, Steel, Steelmaking, Stoichiometry, Strontium titanate, Sulfur–iodine cycle, Sun, Superconductivity, Syngas, Synthetic fuel, Technical University of Denmark, The New York Times, Thermal conductivity and resistivity, Thermonuclear weapon, Tin(IV) oxide, Titanium dioxide, Tracer-gas leak testing, Transition metal, Triatomic hydrogen, Trihydrogen cation, Triplet state, Tritium, Tritium radioluminescence, Ultraviolet, United States, Universe, University of Southern Maine, Unsaturated fat, Vacuum flask, Vacuum polarization, Variable renewable energy, Vegetable oil, Viscosity, Water, Water splitting, Water table, Water–gas shift reaction, Welding, Wiley-Blackwell, Yttrium(III) oxide, Zeppelin, Zinc oxide, Zinc–zinc oxide cycle, Zircon, Zirconium, Zirconium dioxide, 2001 Mars Odyssey.