Fr
Francium-204
Protons (Z)
87
Neutrons (N)
117
Mass number
204
Half-Life
1.75 s
Abundance
---
Mass
204.001 u
Mass Excess
607.0 keV
Spin
3+
Discovered
1964
Binding energy per nucleon
7,735 keV
Neutron separation energy
8,340 keV
Proton separation energy
498 keV
Decay Mode
Decay chain
- FrFrancium-204Z 87 · N 1171.75 s
- α96%
- α52%
- β⁺~100%
- β⁺~100%
- β⁺100%