Rn

Radon-208m

Protons (Z)

86

Neutrons (N)

122

Mass number

208

Half-Life

487.0 ns

Abundance

---

Mass

207.992 u

Mass Excess

-7,827.0 keV

Spin

8+

Discovered

1979

Binding energy per nucleon

7,785 keV

Neutron separation energy

7,263 keV

Proton separation energy

1,889 keV

Decay Mode

γRadon-208100%

Decay chain

Radon-208Z 86 · N 122487.0 ns
γ100%
α62%
β⁺99.33%
β⁺100%