Arsenic-77 (As-77)

Identity

Protons

33

Neutrons

44

Mass number

77

Mass

76.9 ± 1.8 u

Mass excess

-73.916 MeV

Spin

3/2-

Stability

Half-life: 1.62 days

Natural occurrence

Not found in nature

Decays to

• beta minus → Se-77