Bromine-77 (Br-77)

Identity

Protons

35

Neutrons

42

Mass number

77

Mass

76.9 ± 3.0 u

Mass excess

-73.235 MeV

Spin

3/2-*

Stability

Half-life: 2.38 days

Natural occurrence

Not found in nature

Decays to

• positron emission → Se-77