Comparison of Bromine and Radon

Attribute	Bromine ×	Radon ×
Atomic mass (u)	79.9	222.01758
Standard state	Liquid	Gas
Oxidation states	-1 +1 +5	0
Electron configuration	[Ar]4s²3d¹⁰4p⁵	[Xe]6s²4f¹⁴5d¹⁰6p⁶
Atomic radius (van der waals) (pm)	183	220
Electronegativity (pauling scale)	2.96	-
Electron affinity (eV)	3.365	-
Ionization energy (eV)	11.814	10.745
Boiling point (K)	331.95	211.45
Melting point (K)	265.95	202
Density (g/cm³)	3.11	0.00973
Atomic number	35	86
Group name	Halogen	Noble gas
Symbol	Br	Rn
Discovered (year)	1826	1900