Rn
Radon-209n
Protons (Z)
86
Neutrons (N)
123
Mass number
209
Half-Life
3.0 µs
Abundance
---
Mass
208.994 u
Mass Excess
-5,304.0 keV
Spin
35/2+
Discovered
1985
Binding energy per nucleon
7,775 keV
Neutron separation energy
3,720 keV
Proton separation energy
123 keV
Decay Mode
- γ→Radon-209100%
Decay chain
- RnRadon-209Z 86 · N 1233.0 µs
- γ100%
- β⁺83%
- β⁺96.1%
- α99.546%
- EC100%