| Thorium |
|
90Th
|
|
|
| Ìhànsójú |
| silvery white |
| Àwọn ìdámọ́ wíwọ́pọ̀ |
| Orúkọ, àmì-ìdámọ́, nọ́mbà |
thorium, Th, 90 |
| Ẹ̀ka ẹ́límẹ̀nti |
actinide |
| Ẹgbẹ́, àsìkò, àdìpò |
n/a, 7, f |
| Ìwúwo átọ́mù |
232.0381 |
| Ìtòléra ẹ̀lẹ́ktrónì |
[Rn] 6d2 7s2
2, 8, 18, 32, 18, 10, 2 |
| Physical properties |
| Phase |
solid |
| Density (near r.t.) |
11.7 g·cm−3 |
| Melting point |
2115 K, 1842 °C, 3348 °F |
| Boiling point |
5061 K, 4788 °C, 8650 °F |
| Heat of fusion |
13.81 kJ·mol−1 |
| Heat of vaporization |
514 kJ·mol−1 |
| Molar heat capacity |
26.230 J·mol−1·K−1 |
| Vapor pressure |
| P (Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T (K) |
2633 |
2907 |
3248 |
3683 |
4259 |
5055 |
|
| Atomic properties |
| Oxidation states |
4, 3, 2 (weakly basic oxide) |
| Electronegativity |
1.3 (Pauling scale) |
| Ionization energies |
1st: 587 kJ·mol−1 |
| 2nd: 1110 kJ·mol−1 |
| 3rd: 1930 kJ·mol−1 |
| Atomic radius |
179 pm |
| Covalent radius |
206±6 pm |
| Miscellanea |
| Crystal structure |
face-centered cubic
|
| Magnetic ordering |
paramagnetic[1] |
| Electrical resistivity |
(0 °C) 147 nΩ·m |
| Thermal conductivity |
54.0 W·m−1·K−1 |
| Thermal expansion |
(25 °C) 11.0 µm·m−1·K−1 |
| Speed of sound (thin rod) |
(20 °C) 2490 m·s−1 |
| Young's modulus |
79 GPa |
| Shear modulus |
31 GPa |
| Bulk modulus |
54 GPa |
| Poisson ratio |
0.27 |
| Mohs hardness |
3.0 |
| Vickers hardness |
350 MPa |
| Brinell hardness |
400 MPa |
| CAS registry number |
7440-29-1 |
| Àwọn ísótòpù dídúró jùlọ |
| Main article: Àwọn ísótòpù thorium |
|
|
|
· r |
Tóríọ̀m tabi Thorium je apilese kemika to ni ami-idamo Th ati nomba atomu 90.
Thorium je onide alagbararadio to sele ladanida.
