I

Iodine-131

Protons (Z)

53

Neutrons (N)

78

Mass number

131

Half-Life

8.02 d

Abundance

---

Mass

130.906 u

Mass Excess

-87,442.7 keV

Spin

7/2+

Discovered

1939

Binding energy per nucleon

8,422 keV

Neutron separation energy

8,578 keV

Proton separation energy

7,379 keV

Decay Mode

β⁻Xenon-131100%

Decay chain

Iodine-131Z 53 · N 788.02 d
β⁻100%