Radium-228 (Ra-228)

Identity

Protons

88

Neutrons

140

Mass number

228

Mass

228.0 ± 2.1 u

Mass excess

28.940 MeV

Spin

0+

Stability

Half-life: 5.75 years

Natural occurrence

Not found in nature

Decays to

• beta minus → Ac-228 (no page)

Produced by

• Th-232