| Isotopes of Radium |
Notes
|
| Ra-224, Ra-226 and Ra-228 are all generated in the decay of either Uranium or Thorium. |
| Radium is over one million times more radioactive than the same mass of uranium. Radium loses about 1% of its activity in 25 years, being transformed into elements of lower atomic weight with lead being the final product of disintegration. |
Notable Isotopes ![]() |
223Ra [135 neutrons] |
224Ra [136 neutrons] |
226Ra [138 neutrons] |
228Ra [140 neutrons] |