C
Carbon-21
Protons (Z)
6
Neutrons (N)
15
Mass number
21
Half-Life
---
Abundance
---
Mass
21.049 u
Mass Excess
45,640.0 keV
Spin
(1/2+)
Discovered
---
Binding energy per nucleon
5,674 keV
Neutron separation energy
-69 keV
Proton separation energy
31,049 keV
Decay Mode
- n→Carbon-20
Decay chain
- CCarbon-21Z 6 · N 15Unknown
- n
- β⁻n70%
- β⁻58.2%
- β⁻100%