Bismuth-208 (Bi-208)

Identity

Protons

83

Neutrons

125

Mass number

208

Mass

208.0 ± 2.5 u

Mass excess

-18.870 MeV

Spin

5+*

Stability

Half-life: 3.68 × 10⁵ years

Natural occurrence

Not found in nature

Decays to

• positron emission → Pb-208

Produced by

• Po-208