Thorium |
---|
Pípè | /ˈθɔːriəm/ (THOR-ee-əm) |
---|
Ìhànsójú | silvery white |
---|
Ìwúwo átọ̀mù Ar, std(Th) | 232.0377(4)[1] |
---|
Thorium ní orí tábìlì àyè |
---|
|
Nọ́mbà átọ̀mù (Z) | 90 |
---|
Ẹgbẹ́ | group n/a |
---|
Àyè | àyè 7 |
---|
Àdìpọ̀ | Àdìpọ̀-f |
---|
Ẹ̀ka ẹ́límẹ́ntì | Actinide |
---|
Ìtò ẹ̀lẹ́ktrọ́nù | [Rn] 6d2 7s2 |
---|
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 18, 32, 18, 10, 2 |
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Àwọn ohun ìní ara |
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Ìfarahàn at STP | solid |
---|
Ìgbà ìyọ́ | 2115 K (1842 °C, 3348 °F) |
---|
Ígbà ìhó | 5061 K (4788 °C, 8650 °F) |
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Kíki (near r.t.) | 11.7 g/cm3 |
---|
Heat of fusion | 13.81 kJ/mol |
---|
Heat of | 514 kJ/mol |
---|
Molar heat capacity | 26.230 J/(mol·K) |
---|
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 | +1, +2, +3, +4 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
---|
Electronegativity | Pauling scale: 1.3 |
---|
Atomic radius | empirical: 179 pm |
---|
Covalent radius | 206±6 pm |
---|
Spectral lines of thorium |
Other properties |
---|
Natural occurrence | primordial |
---|
Crystal structure | (fcc) |
---|
Speed of sound thin rod | 2490 m/s (at 20 °C) |
---|
Thermal expansion | 11.0 µm/(m·K) (at 25 °C) |
---|
Thermal conductivity | 54.0 W/(m·K) |
---|
Electrical resistivity | 147 n Ω·m (at 0 °C) |
---|
Magnetic ordering | paramagnetic[2] |
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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 Number | 7440-29-1 |
---|
Main isotopes of thorium |
---|
|
Àdàkọ:Category-inline | references |