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thorium (Th)
A silvery-white metallic element with 13 radioactive isotopes only one of which, thorium-232, occurs naturally. It is used in magnesium alloys and isotope 232 is potential source of nuclear energy.
| atomic number | 90 |
| relative atomic mass | 232.04 |
| relative density | 14.66 |
| melting point | 1,700 °C (3,100 °F) |
| boiling point | 4,000 °C (7,200 °F) |
Related categories
• ATOMIC AND NUCLEAR PHYSICS
• INORGANIC CHEMISTRY
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