Noble gas

Radon

Radon (Rn) has atomic number 86. PubChem classifies it as noble gas.

Atomic number

86

Symbol

Rn

Atomic weight (source value)

222.01758

Electron configuration

[Xe]6s2 4f14 5d10 6p6

Standard state

Gas

Electronegativity (Pauling)

Not provided

Melting point (K)

202

Boiling point (K)

211.45

Density (g/cm³)

0.00973

Oxidation states

0

Understanding this entry

Atomic number is the number of protons in the nucleus. Properties are reference values and may depend on conditions and measurement conventions. An atomic weight is not the mass of every isotope. For elements without a standard atomic weight, a source may report an isotope mass number. Blank source values are shown as unavailable rather than estimated.

Further reading and reference: NIH PubChem source dataset ↗. Values and educational summaries are not a substitute for specialised advice.