At

Astatine-217

Protons (Z)

85

Neutrons (N)

132

Mass number

217

Half-Life

32.6 ms

Abundance

---

Mass

217.005 u

Mass Excess

4,395.0 keV

Spin

9/2-

Discovered

1947

Binding energy per nucleon

7,745 keV

Neutron separation energy

5,933 keV

Proton separation energy

4,676 keV

Decay Mode

Decay chain

Astatine-217Z 85 · N 13232.6 ms
α99.992%
β⁻97.91%
α100%
β⁻100%
α100%