Comparison of Fluorine and Krypton

Attribute	Krypton ×	Fluorine ×
Atomic mass (u)	83.8	18.99840316
Standard state	Gas	Gas
Oxidation states	0	-1
Electron configuration	[Ar]4s²3d¹⁰4p⁶	[He]2s²2p⁵
Atomic radius (van der waals) (pm)	202	135
Electronegativity (pauling scale)	3	3.98
Electron affinity (eV)	-	3.339
Ionization energy (eV)	14	17.423
Boiling point (K)	119.93	85.03
Melting point (K)	115.79	53.53
Density (g/cm³)	0.003733	0.001696
Atomic number	36	9
Group name	Noble gas	Halogen
Symbol	Kr	F
Discovered (year)	1898	1670