I

Iodine-121

Protons (Z)

53

Neutrons (N)

68

Mass number

121

Half-Life

2.12 h

Abundance

---

Mass

120.907 u

Mass Excess

-86,246.0 keV

Spin

5/2+

Discovered

1950

Binding energy per nucleon

8,441 keV

Neutron separation energy

10,570 keV

Proton separation energy

4,173 keV

Decay Mode

β⁺Tellurium-121100%

Decay chain

Iodine-121Z 53 · N 682.12 h
β⁺100%
β⁺100%