Fr

Francium-212n

Protons (Z)

87

Neutrons (N)

125

Mass number

212

Half-Life

604.0 ns

Abundance

---

Mass

211.999 u

Mass Excess

-1,024.0 keV

Spin

15-

Discovered

1977

Binding energy per nucleon

7,755 keV

Neutron separation energy

4,955 keV

Proton separation energy

-442 keV

Decay Mode

γFrancium-212100%

Decay chain

Francium-212Z 87 · N 125604.0 ns
γ100%
β⁺57%
α100%
α~100%