Comparison of Bromine and Radon

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