Symbol	Kr	Atomic radius: pm	-	Fusion: kJ/Mole	1.64
Name	Krypton	Ionic radius: pm	-	Boiling point: °C	-153
Atomic number	36	Electron affinity	Unstable anion	Melting point: °C	-157tp
Atomic weight	83.80	1st  ion potential	14.00	Specific Heat Cap: J/(g K)	0.25
Classification	Noble gas	Natural form	Gas	Thermal Cond: W/(cm K)	<0.001
Configuration	[Ar]3d104s2p6	Crystal structure	FCC	Electrical Cond	-
Oxidation states	-	Density	3.73	Abundance: mg/kg-crust	<0.001
Electronegativity	-	Vaporization: kJ/Mole	9.08
Krypton was discovered in 1898 by the English chemists Sir William Ramsay and Morris W. Travers.			Uses - lamps, UV lasers