Fr
Francium-212m
Protons (Z)
87
Neutrons (N)
125
Mass number
212
Half-Life
31.9 µs
Abundance
---
Mass
211.998 u
Mass Excess
-1,965.0 keV
Spin
11+
Discovered
1977
Binding energy per nucleon
7,760 keV
Neutron separation energy
5,896 keV
Proton separation energy
499 keV
Decay Mode
- γ→Francium-212100%
Decay chain
- FrFrancium-212Z 87 · N 12531.9 µs
- γ100%
- β⁺57%
- α100%
- α~100%