Fr

Francium-216

Protons (Z)

87

Neutrons (N)

129

Mass number

216

Half-Life

700.0 ns

Abundance

---

Mass

216.003 u

Mass Excess

2,971.0 keV

Spin

(1-)

Discovered

1970

Binding energy per nucleon

7,742 keV

Neutron separation energy

5,418 keV

Proton separation energy

3,149 keV

Decay Mode

Decay chain

Francium-216Z 87 · N 129700.0 ns
α100%
α100%
β⁺100%