Torium |
| Simbool | Th |
|---|---|
| Latynse naam | Thorium |
| Atoomgetal | 90 |
| Periode | 7 |
| Element kategorie | Innerlike oorgangselemente |
| Relatieve atomiese massa | 232.0381 |
| Groep | IV.B |
| Electronegativiteit | 1.3 |
| Oksidering nommers | 4 |
| Elektronkonfigurasie | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f0 6d2 7s2 |
| Digtheid [g/cm3] | 11.72 |
| Staat | Vaste stof |
| Smeltpunt [°C] | 1750 |
| Kookpunt [°C] | 4500 |
| Termiese geleidingsvermoë [W m-1K-1] | 54 |
| Hitte kapasiteit [J K-1g-1] | 0.113 |
| Ontdekking | 1828 |
| Hardheid [Mohs-skaal] | 3 |
| Vickers se hardheid [MPa] | 350 |
| Brinell-hardheid [MPa] | 400 |
| Young's modulus [GPa] | 79 |
| Elektriese geleiding [S m-1] | 6.7 · 106 |
| Shear modulus [GPa] | 31 |
| 1ste ionisasie-energie [eV] | 6.08 |
| 2de ionisasie-energie [eV] | 11.504 |
| 3de ionisasie-energie [eV] | 20.003 |
| Stabiele isotope | 0 |
| Onstabiele isotope | 12 |