Radium-223 (Ra-223)

Identity

Protons

88

Neutrons

135

Mass number

223

Mass

223.0 ± 2.2 u

Mass excess

17.233 MeV

Spin

3/2+*

Stability

Half-life: 11.4 days

Natural occurrence

Not found in nature

Decays to

• alpha → Rn-219 (no page)

Produced by

• Th-227