Fr

Francium-207

Protons (Z)

87

Neutrons (N)

120

Mass number

207

Half-Life

14.8 s

Abundance

---

Mass

206.997 u

Mass Excess

-2,849.0 keV

Spin

9/2-

Discovered

1964

Binding energy per nucleon

7,756 keV

Neutron separation energy

9,673 keV

Proton separation energy

1,005 keV

Decay Mode

Decay chain

Francium-207Z 87 · N 12014.8 s
α95%
β⁺69%
β⁺99.89%
β⁺100%
EC100%