Jump to: navigation, search


Name Argon
Atomic Number 18
Atomic Weight 39.948(1)
Symbol Ar
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.


Unknown extension tag "references"


Do you see an error on this page? Please create an account and help us edit this page. Your help is greatly appreciated.