At
Astatine-200n
Protons (Z)
85
Neutrons (N)
115
Mass number
200
Half-Life
8.0 s
Abundance
---
Mass
199.991 u
Mass Excess
-8,644.0 keV
Spin
(10-)
Discovered
1967
Binding energy per nucleon
7,782 keV
Neutron separation energy
7,892 keV
Proton separation energy
694 keV
Decay Mode
Decay chain
- AtAstatine-200Z 85 · N 1158.0 s
- α10.5%
- β⁺~100%
- β⁺~100%
- β⁺100%