Fr
Francium-199n
Protons (Z)
87
Neutrons (N)
112
Mass number
199
Half-Life
2.2 ms
Abundance
---
Mass
199.008 u
Mass Excess
7,020.0 keV
Spin
(13/2+)
Discovered
2013
Binding energy per nucleon
7,694 keV
Neutron separation energy
10,631 keV
Proton separation energy
-961 keV
Decay Mode
Decay chain
- FrFrancium-199Z 87 · N 1122.2 ms
- α100%
- α100%
- α51%
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%