At
Astatine-208
Protons (Z)
85
Neutrons (N)
123
Mass number
208
Half-Life
1.63 h
Abundance
---
Mass
207.987 u
Mass Excess
-12,470.0 keV
Spin
6+
Discovered
1950
Binding energy per nucleon
7,812 keV
Neutron separation energy
7,314 keV
Proton separation energy
2,613 keV
Decay Mode
Decay chain
- AtAstatine-208Z 85 · N 1231.63 h
- β⁺99.45%
- α~100%