At
Astatine-219
Protons (Z)
85
Neutrons (N)
134
Mass number
219
Half-Life
56.0 s
Abundance
---
Mass
219.011 u
Mass Excess
10,396.0 keV
Spin
(9/2-)
Discovered
1953
Binding energy per nucleon
7,720 keV
Neutron separation energy
5,775 keV
Proton separation energy
5,250 keV
Decay Mode
Decay chain
- AtAstatine-219Z 85 · N 13456.0 s
- α93.6%
- β⁻100%
- α~100%
- β⁻100%
- α~100%
- β⁻100%