Pa

Protactinium-225

Protons (Z)

91

Neutrons (N)

134

Mass number

225

Half-Life

1.71 s

Abundance

---

Mass

225.026 u

Mass Excess

24,360.0 keV

Spin

(5/2-)

Discovered

1958

Binding energy per nucleon

7,647 keV

Neutron separation energy

7,573 keV

Proton separation energy

2,925 keV

Decay Mode

αActinium-221100%

Decay chain

Protactinium-225Z 91 · N 1341.71 s
α100%
α100%
α100%
α100%
α100%