Ra
Radium-222
Protons (Z)
88
Neutrons (N)
134
Mass number
222
Half-Life
33.6 s
Abundance
---
Mass
222.015 u
Mass Excess
14,320.0 keV
Spin
0+
Discovered
1948
Binding energy per nucleon
7,697 keV
Neutron separation energy
6,715 keV
Proton separation energy
6,246 keV
Decay Mode
Decay chain
- RaRadium-222Z 88 · N 13433.6 s
- α~100%
- α100%
- α100%
- β⁻~100%
- β⁻~100%
- α100%