Fr
Francium-202m
Protons (Z)
87
Neutrons (N)
115
Mass number
202
Half-Life
286.0 ms
Abundance
---
Mass
202.004 u
Mass Excess
3,359.0 keV
Spin
10-
Discovered
1980
Binding energy per nucleon
7,718 keV
Neutron separation energy
8,301 keV
Proton separation energy
-177 keV
Decay Mode
Decay chain
- FrFrancium-202Z 87 · N 115286.0 ms
- α100%
- α97%
- β⁺~100%
- β⁺~100%
- β⁺100%
- EC100%
- β⁺100%