Bismuth-207 (Bi-207)

Identity

Protons

83

Neutrons

124

Mass number

207

Mass

207.0 ± 2.6 u

Mass excess

-20.055 MeV

Spin

9/2-

Stability

Half-life: 31.2 years

Natural occurrence

Not found in nature

Decays to

• positron emission → Pb-207