At
Astatine-216m
Protons (Z)
85
Neutrons (N)
131
Mass number
216
Half-Life
100.0 µs
Abundance
---
Mass
216.003 u
Mass Excess
2,417.0 keV
Spin
(9-)
Discovered
1971
Binding energy per nucleon
7,752 keV
Neutron separation energy
4,397 keV
Proton separation energy
4,330 keV
Decay Mode
- α→Bismuth-212100%
Decay chain
- AtAstatine-216Z 85 · N 131100.0 µs
- α100%
- β⁻64.046%
- α100%