At

Astatine-210m

Protons (Z)

85

Neutrons (N)

125

Mass number

210

Half-Life

482.0 ns

Abundance

---

Mass

209.99 u

Mass Excess

-9,422.0 keV

Spin

(15-)

Discovered

1970

Binding energy per nucleon

7,800 keV

Neutron separation energy

4,609 keV

Proton separation energy

345 keV

Decay Mode

γAstatine-210100%

Decay chain

Astatine-210Z 85 · N 125482.0 ns
γ100%
β⁺99.825%
α100%