Sb

Antimony-121

Protons (Z)

51

Neutrons (N)

70

Mass number

121

Half-Life

Stable

Abundance

57.21%

Mass

120.904 u

Mass Excess

-89,599.2 keV

Spin

5/2+

Discovered

1922

Binding energy per nucleon

8,482 keV

Neutron separation energy

9,254 keV

Proton separation energy

5,790 keV

Decay Mode

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