Fr
Francium-212
Protons (Z)
87
Neutrons (N)
125
Mass number
212
Half-Life
20.0 m
Abundance
---
Mass
211.996 u
Mass Excess
-3,516.0 keV
Spin
5+
Discovered
1950
Binding energy per nucleon
7,767 keV
Neutron separation energy
7,447 keV
Proton separation energy
2,050 keV
Decay Mode
Decay chain
- FrFrancium-212Z 87 · N 12520.0 m
- β⁺57%
- α100%
- α~100%