radon

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Symbol:

Rn

Atomic Number:

86

Relative Atomic Mass:

222.0176 g mol^-1

Natural Abundance in Lithosphere, hydrosphere and atmosphere:

6 x 10^-16% (mass fraction)

Electron Configuration:

[Xe]4f¹⁴5d¹⁰6s²6p⁶

Oxidation States:

II

Boiling Point:

-61.8°C

Density:

9.23 g L^-1 (at 1013 mbar)

First Ionisation Energy:

10.748 eV

Number of Natural Isotopes:

4