Be
Beryllium-12
Protons (Z)
4
Neutrons (N)
8
Mass number
12
Half-Life
21.46 ms
Abundance
---
Mass
12.027 u
Mass Excess
25,077.8 keV
Spin
0+
Discovered
1966
Binding energy per nucleon
5,721 keV
Neutron separation energy
3,171 keV
Proton separation energy
22,939 keV
Decay Mode
Decay chain
- BeBeryllium-12Z 4 · N 821.46 ms
- β⁻99.5%
- β⁻99.4%