At

Astatine-204m

Protons (Z)

85

Neutrons (N)

119

Mass number

204

Half-Life

108.0 ms

Abundance

---

Mass

203.988 u

Mass Excess

-11,288.0 keV

Spin

10-

Discovered

1969

Binding energy per nucleon

7,801 keV

Neutron separation energy

7,196 keV

Proton separation energy

1,266 keV

Decay Mode

γAstatine-204100%

Decay chain

Astatine-204Z 85 · N 119108.0 ms
γ100%
β⁺96.2%
β⁺99.33%
β⁺100%