Rn
Radon-203m
Protons (Z)
86
Neutrons (N)
117
Mass number
203
Half-Life
26.9 s
Abundance
---
Mass
202.994 u
Mass Excess
-5,822.0 keV
Spin
13/2+
Discovered
1967
Binding energy per nucleon
7,769 keV
Neutron separation energy
7,618 keV
Proton separation energy
2,516 keV
Decay Mode
Decay chain
- RnRadon-203Z 86 · N 11726.9 s
- α75%
- β⁺92.5%
- β⁺100%
- β⁺100%
- β⁺100%