Ra

Radium-219

Protons (Z)

88

Neutrons (N)

131

Mass number

219

Half-Life

9.0 ms

Abundance

---

Mass

219.01 u

Mass Excess

9,394.0 keV

Spin

(7/2+)

Discovered

1952

Binding energy per nucleon

7,714 keV

Neutron separation energy

5,323 keV

Proton separation energy

4,954 keV

Decay Mode

αRadon-215100%

Decay chain

Radium-219Z 88 · N 1319.0 ms
α100%
α100%
α100%