Fr

Francium-218m

Protons (Z)

87

Neutrons (N)

131

Mass number

218

Half-Life

21.9 ms

Abundance

---

Mass

218.008 u

Mass Excess

7,147.0 keV

Spin

(8-)

Discovered

1982

Binding energy per nucleon

7,726 keV

Neutron separation energy

5,239 keV

Proton separation energy

3,801 keV

Decay Mode

Decay chain

Francium-218Z 87 · N 13121.9 ms
α100%
α100%
β⁻~100%
α100%