I

Iodine-129

Protons (Z)

53

Neutrons (N)

76

Mass number

129

Half-Life

16.14 My

Abundance

---

Mass

128.905 u

Mass Excess

-88,507.0 keV

Spin

7/2+

Discovered

1951

Binding energy per nucleon

8,436 keV

Neutron separation energy

8,840 keV

Proton separation energy

6,802 keV

Decay Mode

β⁻Xenon-129100%

Decay chain

Iodine-129Z 53 · N 7616.14 My
β⁻100%