Pa

Protactinium-217

Protons (Z)

91

Neutrons (N)

126

Mass number

217

Half-Life

3.8 ms

Abundance

---

Mass

217.018 u

Mass Excess

17,055.0 keV

Spin

9/2-

Discovered

1968

Binding energy per nucleon

7,665 keV

Neutron separation energy

8,840 keV

Proton separation energy

533 keV

Decay Mode

Decay chain

Protactinium-217Z 91 · N 1263.8 ms
α100%
α100%
α89%
β⁺90%
β⁺99.96%
β⁺100%
EC100%