B
Boron-21
Protons (Z)
5
Neutrons (N)
16
Mass number
21
Half-Life
---
Abundance
---
Mass
21.084 u
Mass Excess
78,380.0 keV
Spin
(3/2-)
Discovered
2018
Binding energy per nucleon
4,153 keV
Neutron separation energy
-909 keV
Proton separation energy
---
Decay Mode
- n→Boron-19100%
Decay chain
- BBoron-21Z 5 · N 16Unknown
- n100%
- β⁻n71%
- β⁻68.5%
- β⁻80.8%