Symbol	Ar	Atomic radius: pm	-	Fusion: kJ/Mole	1.18
Name	Argon	Ionic radius: pm	-	Boiling point: °C	-186
Atomic number	18	Electron affinity	Unstable anion	Melting point: °C	-189
Atomic weight	39.95	1st  ion potential	15.76	Specific Heat Cap: J/(g K)	0.52
Classification	Noble gas	Natural form	Gas	Thermal Cond: W/(cm K)	<0.001
Configuration	[Ne]3s2p6	Crystal structure	FCC	Electrical Cond	-
Oxidation states	-	Density	1.78	Abundance: mg/kg-crust	3.5
Electronegativity	-	Vaporization: kJ/Mole	6.43
Argon gas was isolated in 1894 by the English scientists Lord Rayleigh (John William Strutt) and Sir William Ramsey.			Uses - lasers, light bulbs