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58 relations: Accounts of Chemical Research, Analytical Chemistry (journal), Annals of Philosophy, Argon, Atom, Atomic mass, Atomic nucleus, Carbon, Carbon-12, Chemical compound, Chemist, Deuterium, Discovery of the neutron, Halogen, Heavy water, Hydrogen, Integer, International Union of Pure and Applied Chemistry, Ion, Iron, Isomer, Isotope, Isotopologue, Isotopomers, Kendrick mass, List of chemical elements, Mass, Mass (mass spectrometry), Mass number, Mass spectrometry, Mass spectrum, Molecular mass, Molecule, Natural abundance, Neutron, Nitrogen, Nitrogen rule, Nuclear binding energy, Nuclear structure, Nucleon, Organic compound, Oxygen, Oxygen-16, Parity (mathematics), Parts-per notation, Phosphorus, Polyatomic ion, Properties of water, Proton, Prout's hypothesis, ..., Relative atomic mass, Silicon, Structural isomer, Sulfur, Unified atomic mass unit, Unit of measurement, Water, Whole number rule. Expand index (8 more) »
Accounts of Chemical Research
Accounts of Chemical Research is a monthly peer-reviewed scientific journal published by the American Chemical Society containing overviews of basic research and applications in chemistry and biochemistry.
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Analytical Chemistry (journal)
Analytical Chemistry is a biweekly peer-reviewed scientific journal published since 1929 by the American Chemical Society.
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Annals of Philosophy
Annals of Philosophy was a learned journal founded in 1813 by the Scottish chemist Thomas Thomson.
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Argon
Argon is a chemical element with symbol Ar and atomic number 18.
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Atom
An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element.
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Atomic mass
The atomic mass (ma) is the mass of an atom.
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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.
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Carbon
Carbon (from carbo "coal") is a chemical element with symbol C and atomic number 6.
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Carbon-12
Carbon-12 is the more abundant of the two stable isotopes of carbon (Carbon-13 being the other), amounting to 98.93% of the element carbon; its abundance is due to the triple-alpha process by which it is created in stars.
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Chemical compound
A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) composed of atoms from more than one element held together by chemical bonds.
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Chemist
A chemist (from Greek chēm (ía) alchemy; replacing chymist from Medieval Latin alchimista) is a scientist trained in the study of chemistry.
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Deuterium
Deuterium (or hydrogen-2, symbol or, also known as heavy hydrogen) is one of two stable isotopes of hydrogen (the other being protium, or hydrogen-1).
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Discovery of the neutron
The discovery of the neutron and its properties was central to the extraordinary developments in atomic physics that occurred in the first half of the 20th century.
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Halogen
The halogens are a group in the periodic table consisting of five chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
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Heavy water
Heavy water (deuterium oxide) is a form of water that contains a larger than normal amount of the hydrogen isotope deuterium (or D, also known as heavy hydrogen), rather than the common hydrogen-1 isotope (or H, also called protium) that makes up most of the hydrogen in normal water.
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Hydrogen
Hydrogen is a chemical element with symbol H and atomic number 1.
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Integer
An integer (from the Latin ''integer'' meaning "whole")Integer 's first literal meaning in Latin is "untouched", from in ("not") plus tangere ("to touch").
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International Union of Pure and Applied Chemistry
The International Union of Pure and Applied Chemistry (IUPAC) is an international federation of National Adhering Organizations that represents chemists in individual countries.
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Ion
An ion is an atom or molecule that has a non-zero net electrical charge (its total number of electrons is not equal to its total number of protons).
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Iron
Iron is a chemical element with symbol Fe (from ferrum) and atomic number 26.
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Isomer
An isomer (from Greek ἰσομερής, isomerès; isos.
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Isotope
Isotopes are variants of a particular chemical element which differ in neutron number.
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Isotopologue
Isotopologues are molecules that differ only in their isotopic composition.
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Isotopomers
Isotopomers or isotopic isomers are isomers with isotopic atoms, having the same number of each isotope of each element but differing in their positions.
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Kendrick mass
The Kendrick mass is defined by setting the mass of a chosen molecular fragment, typically CH2, to an integer value in atomic mass units.
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List of chemical elements
, 118 chemical elements are identified.
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Mass
Mass is both a property of a physical body and a measure of its resistance to acceleration (a change in its state of motion) when a net force is applied.
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Mass (mass spectrometry)
The mass recorded by a mass spectrometer can refer to different physical quantities depending on the characteristics of the instrument and the manner in which the mass spectrum is displayed.
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Mass number
The mass number (symbol A, from the German word Atomgewichte (atomic weight), also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus. It determines the atomic mass of atoms. Because protons and neutrons both are baryons, the mass number A is identical with the baryon number B as of the nucleus as of the whole atom or ion. The mass number is different for each different isotope of a chemical element. This is not the same as the atomic number (Z) which denotes the number of protons in a nucleus, and thus uniquely identifies an element. Hence, the difference between the mass number and the atomic number gives the number of neutrons (N) in a given nucleus:. The mass number is written either after the element name or as a superscript to the left of an element's symbol. For example, the most common isotope of carbon is carbon-12, or, which has 6 protons and 6 neutrons. The full isotope symbol would also have the atomic number (Z) as a subscript to the left of the element symbol directly below the mass number:. This is technically redundant, as each element is defined by its atomic number, so it is often omitted.
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Mass spectrometry
Mass spectrometry (MS) is an analytical technique that ionizes chemical species and sorts the ions based on their mass-to-charge ratio.
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Mass spectrum
A mass spectrum is an intensity vs.
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Molecular mass
Relative Molecular mass or molecular weight is the mass of a molecule.
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Molecule
A molecule is an electrically neutral group of two or more atoms held together by chemical bonds.
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Natural abundance
In physics, natural abundance (NA) refers to the abundance of isotopes of a chemical element as naturally found on a planet.
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Neutron
| magnetic_moment.
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Nitrogen
Nitrogen is a chemical element with symbol N and atomic number 7.
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Nitrogen rule
The nitrogen rule states that organic compounds containing exclusively hydrogen, carbon, nitrogen, oxygen, silicon, phosphorus, sulfur, and the halogens either have 1) an odd nominal mass that indicates an odd number of nitrogen atoms are present or 2) an even nominal mass that indicates an even number of nitrogen atoms in the molecular formula of the molecular ion. The nitrogen rule is not a rule, per se, as much as a general principle which may prove useful when attempting to solve organic mass spectrometry structures.
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Nuclear binding energy
Nuclear binding energy is the minimum energy that would be required to disassemble the nucleus of an atom into its component parts.
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Nuclear structure
Understanding the structure of the atomic nucleus is one of the central challenges in nuclear physics.
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Nucleon
In chemistry and physics, a nucleon is either a proton or a neutron, considered in its role as a component of an atomic nucleus.
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Organic compound
In chemistry, an organic compound is generally any chemical compound that contains carbon.
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Oxygen
Oxygen is a chemical element with symbol O and atomic number 8.
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Oxygen-16
Oxygen-16 (16O) is a stable isotope of oxygen, having 8 neutrons and 8 protons in its nucleus.
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Parity (mathematics)
In mathematics, parity is the property of an integer's inclusion in one of two categories: even or odd.
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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.
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Phosphorus
Phosphorus is a chemical element with symbol P and atomic number 15.
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Polyatomic ion
A polyatomic ion, also known as a molecular ion, is a charged chemical species (ion) composed of two or more atoms covalently bonded or of a metal complex that can be considered to be acting as a single unit.
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Properties of water
Water is a polar inorganic compound that is at room temperature a tasteless and odorless liquid, which is nearly colorless apart from an inherent hint of blue. It is by far the most studied chemical compound and is described as the "universal solvent" and the "solvent of life". It is the most abundant substance on Earth and the only common substance to exist as a solid, liquid, and gas on Earth's surface. It is also the third most abundant molecule in the universe. Water molecules form hydrogen bonds with each other and are strongly polar. This polarity allows it to separate ions in salts and strongly bond to other polar substances such as alcohols and acids, thus dissolving them. Its hydrogen bonding causes its many unique properties, such as having a solid form less dense than its liquid form, a relatively high boiling point of 100 °C for its molar mass, and a high heat capacity. Water is amphoteric, meaning that it is both an acid and a base—it produces + and - ions by self-ionization.
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Proton
| magnetic_moment.
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Prout's hypothesis
Prout's hypothesis was an early 19th-century attempt to explain the existence of the various chemical elements through a hypothesis regarding the internal structure of the atom.
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Relative atomic mass
Relative atomic mass (symbol: A) or atomic weight is a dimensionless physical quantity defined as the ratio of the average mass of atoms of a chemical element in a given sample to one unified atomic mass unit.
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Silicon
Silicon is a chemical element with symbol Si and atomic number 14.
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Structural isomer
Structural isomerism, or constitutional isomerism (per IUPAC), is a form of isomerism in which molecules with the same molecular formula have different bonding patterns and atomic organization, as opposed to stereoisomerism, in which molecular bonds are always in the same order and only spatial arrangement differs.
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Sulfur
Sulfur or sulphur is a chemical element with symbol S and atomic number 16.
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Unified atomic mass unit
The unified atomic mass unit or dalton (symbol: u, or Da) is a standard unit of mass that quantifies mass on an atomic or molecular scale (atomic mass).
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Unit of measurement
A unit of measurement is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard for measurement of the same kind of quantity.
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Water
Water is a transparent, tasteless, odorless, and nearly colorless chemical substance that is the main constituent of Earth's streams, lakes, and oceans, and the fluids of most living organisms.
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Whole number rule
The whole number rule states that the masses of the isotopes are whole number multiples of the mass of the hydrogen atom.
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Redirects here:
Accurate mass, Average mass, Exact mass, Mass defect (mass spectrometry), Nominal mass, Packing fraction (mass spectrometry).
References
[1] https://en.wikipedia.org/wiki/Mass_(mass_spectrometry)
