Comparison of Astatine and Radon

Attribute	Radon ×	Astatine ×
^1↑Standard state	Gas	Solid
Boiling point (K)	211.45	-
Electron configuration	[Xe]6s²4f¹⁴5d¹⁰6p⁶	[Xe]6s²4f¹⁴5d¹⁰6p⁵
Atomic mass (u)	222.01758	209.98715
Electronegativity (pauling scale)	-	2.2
Oxidation states	0	-1 1 3 5 7
Ionization energy (eV)	10.745	9.5
Atomic radius (van der waals) (pm)	220	202
Melting point (K)	202	575
Electron affinity (eV)	-	2.8
Density (g/cm³)	0.00973	7
Atomic number	86	85
Group name	Noble gas	Halogen
Symbol	Rn	At
Discovered (year)	1900	1940