[222]

Radon

Noble gases · Group 18 · Period 6

Atomic properties

Atomic number	86
Symbol	Rn
Standard atomic weight	[222]
Classification	Noble gases
Group	18
Period	6
Block	p-block
Electron configuration	[Xe] 4f14 5d10 6s2 6p6
Electronegativity (Pauling)	2.20
Common oxidation states	0, +2

Physical properties

Phase at 20 °C	Gas
Density	0.00973 g/cm³
Melting point	-71 °C
Boiling point	-61.7 °C
Discovered	1900
CAS number	—

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