Argon

Source: http://www.tabulka.cz/english/elements/show.asp?id=18

name Argon
latin Argon
french Argon
german Argon
symbol Ar
proton number 18
atomic weight 39.948
Pauling electronegativity -
electronic configuration [Ne] 3s23p6
1s22s22p63s23p6
melting point 83.8 K, -189.35°C, -308.83°F
boiling point 87.3 K, -185.85°C, -302.53°F
group 18
period 3
state (by 20°C) gas
oxidation states -

Discoverer

Year of discovery Discoverers
1894 Lord John William Strutt Rayleigh (1842-1919)
Sir William Ramsay (1852-1916)


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