Mercury-197 (Hg-197)

Identity

Protons

80

Neutrons

117

Mass number

197

Mass

197.0 ± 3.4 u

Mass excess

-30.540 MeV

Spin

1/2-*

Stability

Half-life: 2.71 days

Natural occurrence

Not found in nature

Decays to

• electron capture → Au-197