Th

Thorium-225

Protons (Z)

90

Neutrons (N)

135

Mass number

225

Half-Life

8.75 m

Abundance

---

Mass

225.024 u

Mass Excess

22,310.0 keV

Spin

3/2+

Discovered

1949

Binding energy per nucleon

7,659 keV

Neutron separation energy

5,757 keV

Proton separation energy

5,213 keV

Decay Mode

Decay chain

Thorium-225Z 90 · N 1358.75 m
α90%
α~100%
α100%
α100%
β⁻100%
α100%