![]() It has the atomic number 18 in the periodic table and belongs in Group 18, the Noble Gases. Argon (Ar) exists as a colourless, odourless gas and is chemically inert. "Investigation of 3 Industry-Wide Applied Storage Conditions for Compound Libraries". Winkler, Dirk Kirchhoff, Christian Schierholz, Bernd Wölcke, Julian (2007). : CS1 maint: DOI inactive as of January 2024 ( link) "Fire Suppression with Inert Gas Agents". Journal of Applied Animal Welfare Science. ![]() "A Critical Review of Electrical Water-Bath Stun Systems for Poultry Slaughter and Recent Developments in Alternative Technologies". ↑ "Periodic Table of Elements: Argon - Ar ()".Oxford: Oxford University Press, Incorporated. Nature's Building Blocks : an a-Z Guide to the Elements (2nd ed.). ↑ "The Nobel Prize in Chemistry 1904".Proceedings of the Royal Society of London. Argon, a new constituent of the atmosphere". "The NUBASE2020 evaluation of nuclear properties" (PDF). Boca Raton, Florida: Chemical Rubber Company Publishing. CRC Handbook of Chemistry and Physics (86th ed.). ↑ Magnetic susceptibility of the elements and inorganic compounds, in Lide, D.Kirk Othmer Encyclopedia of Chemical Technology. CRC Handbook of Chemistry and Physics (92nd ed.). Argon has been used by athletes as a doping agent and has been banned as use. Argon is also used as a preservative for such products as varnish, polyurethane, and paint. Argon is sometimes used as the propellant in aerosol cans. Liquid argon is used in neutrino experiments and looking for dark matter. Argon is sometimes used for extinguishing (ending) fires. Argon is used in the poultry industry to asphyxiate birds. It can also be used in neon lights for a purple color. Because of this, it is used in knowing how old rocks are.Īrgon is often used when welding steel and similar work, to push away the air around the weld, so the oxygen in the air can't join with the metal being welded. Ĥ0Ar is made by the decay of 40K with a half-life of 1.25 billion years by electron capture or positron emission. About 700,000 tonnes of argon are produced worldwide every year. Production Īrgon is gotten industrially by the fractional distillation of liquid air. ![]() But other planets have different isotopes of argon. ![]() The most abundant isotope of argon is 40Ar. Argon is a heavier gas than helium, so if a balloon is filled with argon, it would fall to the ground.Īrgon was first removed from air in 1894 by Lord Rayleigh and Sir William Ramsay at University College London by removing oxygen, carbon dioxide, water, and nitrogen from a sample of clean air. However, some compounds have been formed, like argon fluorohydride (HArF). Not many compounds can be made from Argon. It is not toxic and it does not burn easily. About 1% of the Earth's atmosphere (the air around us) is argon. The name "argon" is from the Greek word ἀργός meaning "lazy" or "inactive" because it does not react with other chemicals.Īrgon atoms are found in air. Argon is the third-most abundant gas in the Earth's atmosphere. Its symbol is argon is Ar and its atomic number is 18.
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