Argon-37 (Ar-37)

Identity

Protons

18

Neutrons

19

Mass number

37

Mass

36.97 ± 0.22 u

Mass excess

-30.948 MeV

Spin

3/2+*

Stability

Half-life: 35 days

Natural occurrence

Not found in nature

Decays to

• electron capture → Cl-37