At
Astatine-220
Protons (Z)
85
Neutrons (N)
135
Mass number
220
Half-Life
3.71 m
Abundance
---
Mass
220.015 u
Mass Excess
14,376.0 keV
Spin
(3-)
Discovered
1989
Binding energy per nucleon
7,704 keV
Neutron separation energy
4,091 keV
Proton separation energy
5,594 keV
Decay Mode
Decay chain
- AtAstatine-220Z 85 · N 1353.71 m
- β⁻92%
- α100%
- α100%
- β⁻100%
- β⁻64.046%
- α100%