Ra

Radium-208

Protons (Z)

88

Neutrons (N)

120

Mass number

208

Half-Life

1.11 s

Abundance

---

Mass

208.002 u

Mass Excess

1,728.0 keV

Spin

0+

Discovered

1967

Binding energy per nucleon

7,732 keV

Neutron separation energy

9,853 keV

Proton separation energy

2,712 keV

Decay Mode

Decay chain

Radium-208Z 88 · N 1201.11 s
α87%
α72.4%
β⁺88.9%
β⁺100%
EC100%
β⁺100%