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radium (Ra)
A rare, brilliant-white, luminescent, highly radioactive, metallic element having 16 isotopes of which radium 226, with a half-life of 1,622 years is the most common. Radium is used in cancer radiotherapy, as a neutron source for some research purposes, and as a constituent of luminescent paints. It is one of the alkaline earth metals.
| atomic number | 88 |
| melting point | 700 °C (1,292 °F) |
| boiling point | 1,737 °C (3,157 °F) |
Related categories
• ATOMIC AND NUCLEAR PHYSICS
• INORGANIC CHEMISTRY
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