|Melting Point ( °C )||83.81 K (−189.34 °C, −308.81 °F)|
|Boiling Point ( °C )||87.302 K (−185.848 °C, −302.526 °F)|
|Density (g/cm3)||1.784 g/L(at 0 °C, 101.325 kPa)|
|Earth crust (%)|
|Discovery (Year)||Lord Rayleigh and William Ramsay (1894)|
|Group||group 18, noble gas, block p|
|Electron configuration||[Ne] 3s2 3p6|
|Ionization energy (eV)||1st: 1520.6 kJ·mol−1
2nd: 2665.8 kJ·mol−1 3rd: 3931 kJ·mol−1 (more)
Argon was suspected by Henry Cavendish in 1785 but wasn't discovered until 1894 by Sir William Ramsay. <Ref> Bentor, Y. Argon. Retrieved January 21, 2009, from http://www.chemicalelements.com/elements/ar.html</ref> The element symbol for argon is Ar and the gas was produced by factorization of liquid air. <ref name="UC"> University of California.(2003). Argon. Retrieved January 21, 2009, from http://periodic.lanl.gov/elements/18.html</ref> The element argon has the same solubility as oxygen. When argon is in the form of a gas and liquid it's colorless and odorless. It is also known as a non reactive gas and it can't form a true chemical compound. <ref name="UC" /> This element is used in electric light bulbs,fluorescent lighting, filling photo tubes, and glow tubes. It is also used as a shield when it is an inert gas.
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