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Tungsten, also known as wolfram, is a chemical element with symbol W and atomic number 74. [1]

223 relations: A15 phases, Abrasive, Acetylene hydratase, Acid, Alkali, Alkalinity, Alloy, Alpha decay, Ammonium tetrathiomolybdate, Archaea, Atomic number, BBC News, Bergara, Biomolecule, Borosilicate glass, Brittleness, Brushed metal, Bullet, Calcium, Cancer, Cancer cluster, Carbide, Carbon, Carl Wilhelm Scheele, Catalysis, Cathode ray tube, Celsius, Centers for Disease Control and Prevention, Ceramic, Charcoal, Chelation, Chemical compound, Chemical element, Chicago, Chlorine, Circular saw, Cobalt, Conflict resource, Copper, Counterfeit, Covalent bond, Crystal habit, Crystallinity, Cubic crystal system, Dartmoor, Darts, Democratic Republic of the Congo, Dense Inert Metal Explosive, Density, Depleted uranium, ..., Dielectric, Dolly (tool), Drawing (manufacturing), Ductility, Earthworm, Electrical conductor, Electrical resistivity and conductivity, Electrode, Electron microscope, Enzyme, Eukaryote, Extrusion, Fahrenheit, Fallon, Nevada, Fausto Elhuyar, Ferberite, Field emission gun, Fishing lure, Fludeoxyglucose (18F), Fluorescent lamp, Folin–Ciocalteu reagent, Forging, Formate dehydrogenase, Formula One, Free element, Gas tungsten arc welding, General Electric, Georgius Agricola, Gold, Gold bar, Grain boundary, Hacksaw, Hafnium, Half-life, Hand grenade, Hardness, Haynes International, Hübnerite, Heating element, Hemerdon Mine, Heteropoly acid, High-speed steel, Hydrodesulfurization, Hydrogen, Hypoallergenic, Ingot, Integrated circuit, Intercalation (chemistry), Intraperitoneal injection, Ion, Iron, Isotope, Jewellery, Johan Gottschalk Wallerius, Juan José Elhuyar, Keggin structure, Kinetic energy penetrator, Lamp (electrical component), Lead, Leukemia, List of chemical element name etymologies, List of chemical elements naming controversies, London Metal Exchange, Lubricant, Magnesium, Mallory metal, Manganese, Mars Science Laboratory, Median lethal dose, Medicinal radiocompounds, Melting point, Metal, Metal lathe, Metalloprotein, Metalworking, Metastability, Milling (machining), Mining, Missile, Molybdenum, Molybdenum cofactor, Molybdopterin, NASCAR, Nickel, Nitrogen oxide, Nordic countries, NOx, Nuclear isomer, Nuclear medicine, Nuclear physics, Octahedron, Ore, Oxidation state, Oxide, Oxidoreductase, Oxygen, Panasqueira, Petroleum, Phosphorus, Phosphotungstic acid, Plastic, Platinum, Polyoxometalate, Popular Science, Precious metal, Projectile, Prokaryote, ProSieben, Pterin, Pyrolysis, Pyrophoricity, Radiation protection, Radioactive decay, Radionuclide, Real Sociedad Bascongada de Amigos del País, Receptor antagonist, Redox, Reproduction, Ring (jewellery), Rivet, Rocket engine, Rocket engine nozzle, Scheelite, Scintillator, Selective catalytic reduction, Shot (pellet), Silicon, Silicon dioxide, Sintering, Sodium tungstate, Sodium tungsten bronze, Stable isotope ratio, Standard enthalpy of reaction, Steel, Stellite, String (music), Submarine-launched ballistic missile, Superalloy, Superconductivity, Swedish language, Tanning, Technetium, The Periodic Table of Videos, Thermal expansion, Tin, Tonne, Torbern Bergman, Toughness, Toxic heavy metal, Transition metal, Tungstate, Tungsten carbide, Tungsten hexachloride, Tungsten hexafluoride, Tungsten oxide, Tungsten trioxide, Tungsten(IV) sulfide, Tungstic acid, Turbine, UGM-27 Polaris, Ultimate tensile strength, United Kingdom, United States Geological Survey, Uranium, Urine, Vacuum tube, Vapor pressure, William D. Coolidge, Wolframite, World War I, World War II, X-ray, X-ray tube. Expand index (173 more) »

A15 phases

The A15 phases (also known as β-W or Cr3Si structure types) are series of intermetallic compounds with the chemical formula A3B (where A is a transition metal and B can be any element) and a specific structure.

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An abrasive is a material, often a mineral, that is used to shape or finish a workpiece through rubbing which leads to part of the workpiece being worn away.

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Acetylene hydratase

In enzymology, an acetylene hydratase is a rare example of an enzyme containing tungsten.

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An acid (from the Latin acidus/acēre meaning sour) is a chemical substance whose aqueous solutions are characterized by a sour taste, the ability to turn blue litmus red, and the ability to react with bases and certain metals (like calcium) to form salts.

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In chemistry, an alkali (from Arabic: al-qaly القلي, القالي, “ashes of the saltwort”) is a basic, ionic salt of an alkali metal or alkaline earth metal chemical element.

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Alkalinity is the name given to the quantitative capacity of an aqueous solution to neutralize an acid.

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An alloy is a mixture of metals or a mixture of a metal and another element.

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Alpha decay

Alpha decay or α-decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle and thereby transforms or 'decays' into an atom with a mass number that is reduced by four and an atomic number that is reduced by two.

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Ammonium tetrathiomolybdate

Ammonium tetrathiomolybdate is the chemical compound with the formula 2MoS4.

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The Archaea (or or; singular archaeon) constitute a domain or kingdom of single-celled microorganisms.

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Atomic number

In chemistry and physics, the atomic number of a chemical element (also known as its proton number) is the number of protons found in the nucleus of an atom of that element, and therefore identical to the charge number of the nucleus.

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BBC News

BBC News is an operational business division of the British Broadcasting Corporation (BBC) responsible for the gathering and broadcasting of news and current affairs.

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Bergara (Vergara) is a town located in the province of Gipuzkoa, in the autonomous community of Basque Country, in the north of Spain.

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A biomolecule is any molecule that is present in living organisms, including large macromolecules such as proteins, polysaccharides, lipids, and nucleic acids, as well as small molecules such as primary metabolites, secondary metabolites, and natural products.

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Borosilicate glass

Borosilicate glass is a type of glass with silica and boron trioxide as the main glass-forming constituents.

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A material is brittle if, when subjected to stress, it breaks without significant deformation (strain).

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Brushed metal

Brushed or dull polished metal is metal with a unidirectional satin finish.

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A bullet is a projectile propelled by a firearm, sling, slingshot, or air gun.

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Calcium is a chemical element with symbol Ca and atomic number 20.

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Cancer, also known as a malignant tumor or malignant neoplasm, is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body.

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Cancer cluster

A cancer cluster is a disease cluster in which a high number of cancer cases occurs in a group of people in a particular geographic area over a limited period of time.

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In chemistry, a carbide is a compound composed of carbon and a less electronegative element.

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Carbon (from carbo "coal") is a chemical element with symbol C and atomic number 6.

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Carl Wilhelm Scheele

Carl Wilhelm Scheele (9 December 1742 – 21 May 1786) was a Swedish Pomeranian pharmaceutical chemist.

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Catalysis is the increase in the rate of a chemical reaction due to the participation of an additional substance called a catalyst.

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Cathode ray tube

The cathode ray tube (CRT) is a vacuum tube containing one or more electron guns, and a phosphorescent screen used to view images.

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Celsius, historically known as centigrade, is a scale and unit of measurement for temperature.

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Centers for Disease Control and Prevention

The Centers for Disease Control and Prevention (CDC) is the leading national public health institute of the United States.

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A ceramic is an inorganic, nonmetallic solid material comprising metal, nonmetal or metalloid atoms primarily held in ionic and covalent bonds.

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Charcoal is a light, black residue, consisting of carbon and any remaining ash, obtained by removing water and other volatile constituents from animal and vegetation substances.

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Chelation describes a particular way that ions and molecules bind metal ions.

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Chemical compound

A chemical compound (or just compound if used in the context of chemistry) is an entity consisting of two or more different atoms which associate via chemical bonds.

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Chemical element

A chemical element (or element) is a chemical substance consisting of atoms having the same number of protons in their atomic nuclei (i.e. the same atomic number, Z).

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Chicago is the third most populous city in the United States.

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Chlorine is a chemical element with symbol Cl and atomic number 17.

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Circular saw

A circular saw is a power-saw using a toothed or abrasive disc or blade to cut different materials using a rotary motion spinning around an arbor.

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Cobalt is a chemical element with symbol Co and atomic number 27.

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Conflict resource

Conflict resources are natural resources extracted in a conflict zone and sold to perpetuate the fighting.

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Copper is a chemical element with symbol Cu (from cuprum) and atomic number 29.

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To counterfeit means to imitate something.

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Covalent bond

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.

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Crystal habit

In mineralogy, crystal habit is the characteristic external shape of an individual crystal or groups of crystals.

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Crystallinity refers to the degree of structural order in a solid.

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Cubic crystal system

In crystallography, the cubic (or isometric) crystal system is a crystal system where the unit cell is in the shape of a cube.

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Dartmoor is an area of moorland in south Devon, England.

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Darts is a form of throwing sport in which small missiles are thrown at a circular target (dartboard) fixed to a wall.

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Democratic Republic of the Congo

The Democratic Republic of the Congo (République démocratique du Congo), also known as DR Congo, DRC, DROC, RDC, Congo-Kinshasa, or simply Congo is a country located in Central Africa.

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Dense Inert Metal Explosive

Dense Inert Metal Explosive (DIME) is an experimental type of explosive that has a relatively small but effective blast radius.

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The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume.

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Depleted uranium

Depleted uranium (DU; also referred to in the past as Q-metal, depletalloy or D-38) is uranium with a lower content of the fissile isotope U-235 than natural uranium.

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A dielectric material (dielectric for short) is an electrical insulator that can be polarized by an applied electric field.

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Dolly (tool)

A dolly is the name given to a category of tools used in shaping sheet metal.

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Drawing (manufacturing)

Drawing is a metalworking process which uses tensile forces to stretch metal.

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In materials science, ductility is a solid material's ability to deform under tensile stress; this is often characterized by the material's ability to be stretched into a wire.

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An earthworm is a tube-shaped, segmented worm found in the phylum Annelida.

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Electrical conductor

In physics and electrical engineering, a conductor is an object or type of material that allows the flow of electrical current in one or more directions.

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Electrical resistivity and conductivity

Electrical resistivity (also known as resistivity, specific electrical resistance, or volume resistivity) is an intrinsic property that quantifies how strongly a given material opposes the flow of electric current.

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An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit (e.g. a semiconductor, an electrolyte, a vacuum or air).

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Electron microscope

An electron microscope is a microscope that uses a beam of accelerated electrons as a source of illumination.

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Enzymes are macromolecular biological catalysts.

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A eukaryote (or or) is any organism whose cells contain a nucleus and other organelles enclosed within membranes.

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Extrusion is a process used to create objects of a fixed cross-sectional profile.

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Fahrenheit (symbol °F) is a temperature scale based on one proposed in 1724 by the German physicist Daniel Gabriel Fahrenheit (1686–1736), after whom the scale is named.

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Fallon, Nevada

Fallon is a city in Churchill County, Nevada, United States, in the western part of the state.

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Fausto Elhuyar

Fausto de Elhuyar (11 October 1755 – 6 February 1833) was a Spanish chemist, and the joint discoverer of tungsten with his brother Juan José Elhuyar in 1783.

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Ferberite is the iron endmember of the manganese - iron wolframite solid solution series.

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Field emission gun

A field emission gun is a type of electron gun in which a sharply pointed Müller-type emitter is held at several kilovolts negative potential relative to a nearby electrode, so that there is sufficient potential gradient at the emitter surface to cause field electron emission.

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Fishing lure

A fishing lure is a type of artificial fishing bait which is designed to attract a fish's attention.

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Fludeoxyglucose (18F)

Fludeoxyglucose (18F) (INN), or fludeoxyglucose F 18 (USAN and USP), also commonly called fluorodeoxyglucose and abbreviated FDG, 18F-FDG or FDG, is a radiopharmaceutical used in the medical imaging modality positron emission tomography (PET).

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Fluorescent lamp

A fluorescent lamp or a fluorescent tube is a low pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light.

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Folin–Ciocalteu reagent

The Folin–Ciocalteu reagent (FCR) or Folin's phenol reagent or Folin–Denis reagent, also called the gallic acid equivalence method (GAE), is a mixture of phosphomolybdate and phosphotungstate used for the colorimetric in vitro assay of phenolic and polyphenolic antioxidants.

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Forging is a manufacturing process involving the shaping of metal using localized compressive forces.

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Formate dehydrogenase

Formate dehydrogenases are a set of enzymes that catalyse the oxidation of formate to carbon dioxide, donating the electrons to a second substrate, such as NAD+ in formate:NAD+ oxidoreductase (EC or to a cytochrome in formate:ferricytochrome-b1 oxidoreductase (EC

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Formula One

Formula One (also Formula 1 or F1) is the highest class of single-seat auto racing that is sanctioned by the Fédération Internationale de l'Automobile (FIA).

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Free element

In chemistry, a free element is a chemical element that is not combined with or chemically bonded to other elements.

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Gas tungsten arc welding

Gas tungsten arc welding (GTAW), also known as tungsten inert gas (TIG) welding, is an arc welding process that uses a non-consumable tungsten electrode to produce the weld.

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General Electric

General Electric (GE) is an American multinational conglomerate corporation incorporated in New York.

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Georgius Agricola

Georgius Agricola (24 March 1494 – 21 November 1555) was a German Catholic, scholar and scientist.

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Gold is a chemical element with symbol Au (from aurum) and atomic number 79.

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Gold bar

A gold bar, also called a gold ingot or gold bullion, is a quantity of refined metallic gold of any shape that is made by a bar producer meeting standard conditions of manufacture, labeling, and record keeping.

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Grain boundary

A grain boundary is the interface between two grains, or crystallites, in a polycrystalline material.

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A hacksaw is a fine-toothed saw, originally and principally for cutting metal.

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Hafnium is a chemical element with symbol Hf and atomic number 72.

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Half-life (t1⁄2) is the amount of time required for the amount of something to fall to half its initial value.

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Hand grenade

A hand grenade is any small bomb that can be thrown by hand.

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Hardness is a measure of how resistant solid matter is to various kinds of permanent shape change when a compressive force is applied.

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Haynes International

Haynes International Inc. is a manufacturer of metal alloys employing more than 1,070 employees worldwide with sales of $434.4 million in 2007 with 8 plants around the world.

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Hübnerite or hubnerite is a mineral consisting of manganese tungsten oxide (chemical formula: MnWO4, it isn't a tungstate).

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Heating element

A heating element converts electricity into heat through the process of resistive or Joule heating.

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Hemerdon Mine

Hemerdon Mine – now officially known as the Drakelands Mine, and alternatively known as the Hemerdon Ball or Hemerdon Bal Mine – is a historic tungsten and tin mine.

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Heteropoly acid

A heteropoly acid is a class of acid made up of a particular combination of hydrogen and oxygen with certain metals and non-metals.

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High-speed steel

High-speed steel (HSS or HS) is a subset of tool steels, commonly used in tool bits and cutting tools.

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Hydrodesulfurization (HDS) 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.

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Hydrogen is a chemical element with chemical symbol H and atomic number 1.

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Hypoallergenic, meaning "below normal" or "slightly" allergenic, was a term first used in a cosmetics campaign in 1953.

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An ingot is a piece of material, usually metal, that is cast into a shape suitable for further processing.

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Integrated circuit

An integrated circuit or monolithic integrated circuit (also referred to as an IC, a chip, or a microchip) is a set of electronic circuits on one small plate ("chip") of semiconductor material, normally silicon.

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Intercalation (chemistry)

In chemistry, intercalation is the reversible inclusion or insertion of a molecule (or ion) into compounds with layered structures.

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Intraperitoneal injection

Intraperitoneal injection or IP injection is the injection of a substance into the peritoneum (body cavity).

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An ion is an atom or a molecule in which the total number of electrons is not equal to the total number of protons, giving the atom or molecule a net positive or negative electrical charge.

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Iron is a chemical element with symbol Fe (from ferrum) and atomic number 26.

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Isotopes are variants of a particular chemical element which differ in neutron number, although all isotopes of a given element have the same number of protons in each atom.

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Jewellery or jewelrysee American and British spelling differences consists of small decorative items worn for personal adornment, such as brooches, rings, necklaces, earrings, and bracelets.

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Johan Gottschalk Wallerius

Johan Gottschalk Wallerius (11 July 1709 – 16 November 1785) was a Swedish chemist and mineralogist.

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Juan José Elhuyar

Juan José Elhuyar Lubize (15 June 1754 – 20 September 1796) was a Spanish chemist and mineralogist, the joint discoverer of tungsten with his brother Fausto Elhuyar in 1783.

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Keggin structure

Keggin structure is the best known structural form for heteropoly acids.

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Kinetic energy penetrator

A kinetic energy penetrator (KE weapon; also a long-rod penetrator or LRP) is a type of ammunition designed to penetrate vehicle armour which, like a bullet, does not contain explosives and uses kinetic energy to penetrate the target.

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Lamp (electrical component)

A lamp is a replaceable component that produces light from electricity.

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Lead is a chemical element in the carbon group with symbol Pb (from plumbum) and atomic number 82.

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Leukemia (American English) or leukaemia (British English) is a group of cancers that usually begin in the bone marrow and result in high numbers of abnormal white blood cells.

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List of chemical element name etymologies

This is the list of etymologies for all chemical element names.

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List of chemical elements naming controversies

The currently accepted names and symbols of the chemical elements are determined by the International Union of Pure and Applied Chemistry (IUPAC), usually following recommendations by the recognized discoverers of each element.

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London Metal Exchange

The London Metal Exchange (LME) is the futures exchange with the world's largest market in options and futures contracts on base and other metals.

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A lubricant is a substance introduced to reduce friction between surfaces in mutual contact, which ultimately reduces the heat generated when the surfaces move.

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Magnesium is a chemical element with symbol Mg and atomic number 12.

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Mallory metal

Mallory metal is proprietary name for an alloy of tungsten, with other metallic elements added to improve machining.

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Manganese is a chemical element with symbol Mn and atomic number 25.

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Mars Science Laboratory

Mars Science Laboratory (MSL) is a robotic space probe mission to Mars launched by NASA on November 26, 2011, which successfully landed Curiosity, a Mars rover, in Gale Crater on August 6, 2012.

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Median lethal dose

In toxicology, the median lethal dose, LD50 (abbreviation for "lethal dose, 50%"), LC50 (lethal concentration, 50%) or LCt50 is a measure of the lethal dose of a toxin, radiation, or pathogen.

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Medicinal radiocompounds

Medicinal radiocompounds or Radiopharmaceuticals are a group of pharmaceutical drugs which have radioactivity.

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Melting point

The melting point (or, rarely, liquefaction point) of a solid is the temperature at which it changes state from solid to liquid at atmospheric pressure.

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A metal (from Greek μέταλλον métallon, "mine, quarry, metal") is a material (an element, compound, or alloy) that is typically hard, opaque, shiny, and has good electrical and thermal conductivity.

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Metal lathe

A metal lathe or metalworking lathe is a large class of lathes designed for precisely machining relatively hard materials.

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Metalloprotein is a generic term for a protein that contains a metal ion cofactor.

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Metalworking is the process of working with metals to create individual parts, assemblies, or large-scale structures.

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Metastability denotes the phenomenon when a system spends an extended time in a configuration other than the system's state of least energy.

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Milling (machining)

Milling is the machining process of using rotary cutters to remove material from a workpiece advancing (or feeding) in a direction at an angle with the axis of the tool.

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Mining is the extraction of valuable minerals or other geological materials from the earth from an orebody, lode, vein, seam, or reef, which forms the mineralized package of economic interest to the miner.

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In modern usage, a missile is a self-propelled precision-guided munition system, as opposed to an unguided self-propelled munition, referred to as a rocket (although these too can also be guided).

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Molybdenum is a chemical element with symbol Mo and atomic number 42.

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Molybdenum cofactor

Molybdenum cofactor (Moco) is a metal-containing Prosthetic group common to nearly all molybdoenzymes and is ubiquitous to all kingdoms of life.

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Molybdopterins are a class of cofactors found in most molybdenum (Mo) and all tungsten (W) enzymes.

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The National Association for Stock Car Auto Racing (NASCAR) is a family-owned and -operated business venture that sanctions and governs multiple auto-racing sports events.

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Nickel is a chemical element with symbol Ni and atomic number 28.

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Nitrogen oxide

Nitrogen oxide may refer to a binary compound of oxygen and nitrogen, or a mixture of such compounds.

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Nordic countries

The Nordic countries are a geographical and cultural region in Northern Europe and the North Atlantic.

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NOx is a generic term for the mono-nitrogen oxides NO and NO2 (nitric oxide and nitrogen dioxide).

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Nuclear isomer

A nuclear isomer is a metastable state of an atomic nucleus caused by the excitation of one or more of its nucleons (protons or neutrons).

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Nuclear medicine

Nuclear medicine is a medical specialty involving the application of radioactive substances in the diagnosis and treatment of disease.

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Nuclear physics

Nuclear physics is the field of physics that studies the constituents and interactions of atomic nuclei.

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In geometry, an octahedron (plural: octahedra) is a polyhedron with eight faces.

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An ore is a type of rock that contains sufficient minerals with important elements including metals that can be economically extracted from the rock.

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Oxidation state

The oxidation state, often called the oxidation number, is an indicator of the degree of oxidation (loss of electrons) of an atom in a chemical compound.

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An oxide is a chemical compound that contains at least one oxygen atom and one other element in its chemical formula.

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In biochemistry, an oxidoreductase is an enzyme that catalyzes the transfer of electrons from one molecule, the reductant, also called the electron donor, to another, the oxidant, also called the electron acceptor.

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Oxygen is a chemical element with symbol O and atomic number 8.

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Panasqueira is one of the largest tungsten mines in the world.

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Petroleum (L. petroleum, from early 15c. "petroleum, rock oil" (mid-14c. in Anglo-French), from Medieval Latin petroleum, from petra: "rock" + ''oleum'': "oil".) is a naturally occurring, yellow-to-black liquid found in geological formations beneath the Earth's surface, which is commonly refined into various types of fuels.

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Phosphorus is a chemical element with symbol P and atomic number 15.

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Phosphotungstic acid

Phosphotungstic acid (PTA), tungstophosphoric acid (TPA), is a heteropoly acid with the chemical formula 31240.

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Plastic is a material consisting of any of a wide range of synthetic or semi-synthetic organics that are malleable and can be molded into solid objects of diverse shapes.

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Platinum is a chemical element with symbol Pt and atomic number 78.

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In chemistry, a polyoxometalate (abbreviated POM) is a polyatomic ion, usually an anion, that consists of three or more transition metal oxyanions linked together by shared oxygen atoms to form a large, closed 3-dimensional framework.

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Popular Science

Popular Science (also known as PopSci) is an American monthly magazine carrying popular science content, which refers to articles for the general reader on science and technology subjects.

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Precious metal

A precious metal is a rare, naturally occurring metallic chemical element of high economic value.

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A projectile is any object thrown into space (empty or not) by the exertion of a force.

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A prokaryote is a single-celled organism that lacks a membrane-bound nucleus (karyon), mitochondria, or any other membrane-bound organelle.

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ProSieben (Sieben is German for seven) is a commercial television station in Germany distributed to a large extent via cable and satellite along with DVB-T (Digital Video Broadcasting – Terrestrial).

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Pterin is a heterocyclic compound composed of a pteridine ring system, with a keto group and an amino group on positions 4 and 2 respectively.

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Pyrolysis is a thermochemical decomposition of organic material at elevated temperatures in the absence of oxygen (or any halogen).

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A pyrophoric substance (from Greek πυροφόρος, pyrophoros, "fire-bearing") ignites spontaneously in air at or below 55 °C (130 °F).

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Radiation protection

Radiation protection, sometimes known as radiological protection, is the science and practice of protecting people and the environment from the harmful effects of ionizing radiation.

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Radioactive decay

Radioactive decay, also known as nuclear decay or radioactivity, is the process by which a nucleus of an unstable atom loses energy by emitting radiation.

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A radionuclide (radioactive nuclide, radioisotope or radioactive isotope) is an atom that has excess nuclear energy, making it unstable.

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Real Sociedad Bascongada de Amigos del País

The Royal Basque Society of Friends of the Country (in Basque Euskalerriaren Adiskideen Elkartea and in Spanish Real Sociedad Bascongada de Amigos del País), also known as La Bascongada or Bascongada Society, was founded in the mid-18th century to encourage the scientific, cultural and economic development of the Basque Country.

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Receptor antagonist

A receptor antagonist is a type of receptor ligand or drug that blocks or dampens agonist-mediated responses rather than provoking a biological response itself upon binding to a receptor.

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Redox reactions include all chemical reactions in which atoms have their oxidation state changed; in general, redox reactions involve the transfer of electrons between species.

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Reproduction (or procreation) is the biological process by which new individual organisms – "offspring" – are produced from their "parents".

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Ring (jewellery)

A ring is a round band, usually in metal, worn as ornamental jewellery around the finger, or sometimes the toe; it is the most common current meaning of the word "ring".

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A rivet is a permanent mechanical fastener.

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Rocket engine

A rocket engine is a type of jet engine that uses only stored rocket propellant mass for forming its high speed propulsive jet.

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Rocket engine nozzle

A rocket engine nozzle is a propelling nozzle (usually of the de Laval type) used in a rocket engine to expand and accelerate the combustion gases produced by burning propellants so that the exhaust gases exit the nozzle at hypersonic velocities.

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Scheelite is a calcium tungstate mineral with the chemical formula CaWO4.

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A scintillator is a material that exhibits scintillation — the property of luminescenceLeo, 158 when excited by ionizing radiation.

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Selective catalytic reduction

Selective catalytic reduction (SCR) is a means of converting nitrogen oxides, also referred to as with the aid of a catalyst into diatomic nitrogen,, and water,.

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Shot (pellet)

Shot is a collective term for small balls or pellets, often made of lead.

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Silicon is a chemical element with symbol Si and atomic number 14.

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Silicon dioxide

Silicon dioxide, also known as silica (from the Latin silex), is a chemical compound that is an oxide of silicon with the chemical formula.

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Clinker nodules produced by sintering Sintering is the process of compacting and forming a solid mass of material by heat and/or pressure without melting it to the point of liquefaction.

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Sodium tungstate

Sodium tungstate is the inorganic compound with the formula Na2WO4.

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Sodium tungsten bronze

Sodium tungsten bronze is a form of insertion compound with the formula NaxWO3, where x is equal to or less than 1.

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Stable isotope ratio

The term stable isotope has a similar meaning to stable nuclide, but is preferably used when speaking of nuclides of a specific element.

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Standard enthalpy of reaction

The standard enthalpy of reaction (denoted ΔrH⊖) is the enthalpy change that occurs in a system when one mole of matter is transformed by a chemical reaction under standard conditions.

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Steels are alloys of iron and other elements, primarily carbon, widely used in construction and other applications because of their high tensile strengths and low costs.

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Stellite alloy is a range of cobalt-chromium alloys designed for wear resistance.

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String (music)

A string is the vibrating element that produces sound in string instruments such as the guitar, harp, piano, and members of the violin family.

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Submarine-launched ballistic missile

A submarine-launched ballistic missile (SLBM) is a ballistic missile capable of being launched from submarines.

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A superalloy, or high-performance alloy, is an alloy that exhibits several key characteristics: excellent mechanical strength, resistance to thermal creep deformation, good surface stability and resistance to corrosion or oxidation.

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Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled below a characteristic critical temperature.

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Swedish language

Swedish is a North Germanic language, spoken natively by about 9 million people predominantly in Sweden and parts of Finland, where it has equal legal standing with Finnish.

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Tanning is the process of treating skins and hides of animals to produce leather, which is more durable and less susceptible to decomposition.

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Technetium is a chemical element with symbol Tc and atomic number 43.

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The Periodic Table of Videos

The Periodic Table of Videos is a series of videos on YouTube produced by Brady Haran, a former BBC video journalist, featuring Sir Martyn Poliakoff ("The Professor"), Peter Licence, Stephen Liddle, Debbie Kays, Neil Barnes, Sam Tang and others at the University of Nottingham.

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Thermal expansion

Thermal expansion is the tendency of matter to change in volume in response to a change in temperature, when the body is heated its dimension(size) increase.This increase in dimension is called thermal expansion.

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Tin is a chemical element with the symbol Sn (for stannum) and atomic number 50.

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The tonne (British and SI; or metric ton (in the United States) is a non-SI metric unit of mass equal to.

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Torbern Bergman

Torbern Olof Bergman (KVO) (20 March 17358 July 1784) was a Swedish chemist and mineralogist noted for his 1775 Dissertation on Elective Attractions, containing the largest chemical affinity tables ever published.

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In materials science and metallurgy, toughness is the ability of a material to absorb energy and plastically deform without fracturing.

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Toxic heavy metal

A toxic heavy metal is any relatively dense metal or metalloid that is noted for its potential toxicity, especially in environmental contexts.

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Transition metal

In chemistry, the term transition metal (or transition element) has two possible meanings.

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In chemistry a tungstate is a compound that contains an oxoanion of tungsten or is a mixed oxide containing tungsten.

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Tungsten carbide

Tungsten carbide (chemical formula: WC) is a chemical compound (specifically, a carbide) containing equal parts of tungsten and carbon atoms.

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Tungsten hexachloride

Tungsten hexachloride is the chemical compound of tungsten and chlorine with the formula WCl6.

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Tungsten hexafluoride

Tungsten(VI) fluoride, also known as tungsten hexafluoride, is the inorganic compound of tungsten and fluorine with the formula WF6.

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Tungsten oxide

Tungsten has several oxidation states, and therefore oxides.

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Tungsten trioxide

Tungsten(VI) oxide, also known as tungsten trioxide or tungstic anhydride, WO3, is a chemical compound containing oxygen and the transition metal tungsten.

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Tungsten(IV) sulfide

Tungsten(IV) sulfide is the chemical compound with the formula WS2.

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Tungstic acid

Tungstic acid refers to hydrated forms of tungsten trioxide, WO3.

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A turbine (from the Latin turbo, a vortex, related to the Greek τύρβη, tyrbē, meaning "turbulence"), is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work.

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UGM-27 Polaris

The Polaris missile was a two-stage Solid-fuel rocket nuclear-armed submarine-launched ballistic missile (SLBM) built during the Cold War by Lockheed Corporation of California for the United States Navy.

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Ultimate tensile strength

Ultimate tensile strength (UTS), often shortened to tensile strength (TS) or ultimate strength, is the maximum stress that a material can withstand while being stretched or pulled before failing or breaking.

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United Kingdom

The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a sovereign state in Europe.

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United States Geological Survey

The United States Geological Survey (USGS, formerly simply Geological Survey) is a scientific agency of the United States government.

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Uranium is a chemical element with symbol U and atomic number 92.

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Urine (from Latin Urina, ae, f.) is a liquid by-product of the body secreted by the kidneys through a process called urination (or micturition) and excreted through the urethra.

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Vacuum tube

In electronics, vacuum tube, electron tube, tube (in North America), or valve (in Britain and some other regions) is a device that controls electric current between electrodes in an evacuated container.

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Vapor pressure

Vapor pressure or equilibrium vapor pressure is defined as the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system.

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William D. Coolidge

William David Coolidge (October 23, 1873 – February 3, 1975) was an American physicist, who made major contributions to X-ray machines.

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Wolframite, (Fe,Mn)WO4, is an iron manganese tungstate mineral that is the intermediate between ferberite (Fe2+ rich) and hübnerite (Mn2+ rich).

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World War I

World War I (WWI or WW1), also known as the First World War or the Great War, was a global war centered in Europe that began on 28 July 1914 and lasted until 11 November 1918.

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World War II

World War II (WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, though related conflicts began earlier.

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X-radiation (composed of X-rays) is a form of electromagnetic radiation.

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X-ray tube

An X-ray tube is a vacuum tube that produces X-rays.

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Element 74, Tungstem, Tungsten Mining, Tungsten alloy, Tungsten carbonate, Tungsten compounds, Tungsten processing, Tungstenic, Tungston, W (element), Wolfram (element), Wolframium.


[1] https://en.wikipedia.org/wiki/Tungsten

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