Fr

Francium-210m

Protons (Z)

87

Neutrons (N)

123

Mass number

210

Half-Life

475.0 ns

Abundance

---

Mass

210.001 u

Mass Excess

1,073.0 keV

Spin

(23+)

Discovered

2016

Binding energy per nucleon

7,742 keV

Neutron separation energy

3,216 keV

Proton separation energy

-2,725 keV

Decay Mode

γFrancium-210100%

Decay chain

Francium-210Z 87 · N 123475.0 ns
γ100%
α71%
β⁺99.1%
β⁺94.55%
β⁺100%