Kr

Krypton-78

Protons (Z)

36

Neutrons (N)

42

Mass number

78

Half-Life

Stable

Abundance

0.355%

Mass

77.92 u

Mass Excess

-74,178.3 keV

Spin

0+

Discovered

1920

Binding energy per nucleon

8,661 keV

Neutron separation energy

12,080 keV

Proton separation energy

8,232 keV

Decay Mode

β⁺