H
Hydrogen-4
Protons (Z)
1
Neutrons (N)
3
Mass number
4
Half-Life
139.0 ys
Abundance
---
Mass
4.026 u
Mass Excess
24,620.0 keV
Spin
2-
Discovered
1981
Binding energy per nucleon
1,721 keV
Neutron separation energy
-1,599 keV
Proton separation energy
---
Decay Mode
- n→Hydrogen-3100%
Decay chain
- HHydrogen-4Z 1 · N 3139.0 ys
- n100%
- β⁻100%