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Thorium, 90 Th Thorium Pípè / ˈ θ ɔːr i ə m / (THOR -ee-əm ) Ìhànsójú silvery white Ìwúwo átọ̀mù A r, 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 Àwọn ohun ìní ara Ìfarahàn at STP solid Ìgbà ìyọ́ 2115 K (1842 °C, 3348 °F) Ígbà ìhó 5061 K (4788 °C, 8650 °F) 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 Color lines in a spectral range Spectral lines of thoriumOther 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] 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
Tóríọ̀m tabi Thorium je apilese kemika to ni ami-idamo Th ati nomba atomu 90.
Thorium je onide alagbararadio to sele ladanida.
Itokasi
↑ Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. doi :10.1515/pac-2015-0305 .
↑ Magnetic susceptibility of the elements and inorganic compounds , in Handbook of Chemistry and Physics 81th edition, CRC press.