|
| Atomic Number | 90 |
|
| Atomic Symbol | Th |
|
| Atomic Weight | 232.0381 amu |
|
| Group | Rare Earth (Actinide Series) |
|
| Form | Solid |
|
| Density @ STP | 11.7 g/cm3 |
|
| Melting Point | 1750 °C (3182 °F, 2023.15 °K) |
|
| Boiling Point | 4788 °C (8650.4 °F, 5061.15 °K) |
|
| Heat of Fusion | 13.81 kJ/mol |
|
| Heat of Vaporization | 530 kJ/mol |
|
| First Ionization Potential | 6.08 eV |
|
| Electronegativity (on Pauling scale) | 1.3 |
|
| Specific Heat Capacity | 0.113 J/g K |
|
| Ground State Electron Configuration | 5d10 6s2 6p6 6d2 6f2 |
|
| Oxidation States | +4 |
|
| Stable Isotopes and Natural Abundance on Earth | 232Th, 100% |
|
| Selected Radioisotopes | 228Th, 229Th, 230Th, 232Th |
|
| Crystal Structure | Cubic |
|
| Discovered by | Berzelius, 1828 |
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