Ca

Calcium-40

Protons (Z)

20

Neutrons (N)

20

Mass number

40

Half-Life

Stable

Abundance

96.941%

Mass

39.963 u

Mass Excess

-34,846.402 keV

Spin

0+

Discovered

1922

Binding energy per nucleon

8,551 keV

Neutron separation energy

15,635 keV

Proton separation energy

8,328 keV

Decay Mode

β⁺