Tóríọ̀m

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Thorium
90Th
Ce

Th

(Uqn)
actiniumthoriumprotactinium
Ìhànsójú
silvery white
Àwọn ìdámọ́ wíwọ́pọ̀
Orúkọ, àmì-ìdámọ́, nọ́mbà thorium, Th, 90
Ẹ̀ka ẹ́límẹ̀nti actinide
Ẹgbẹ́, àsìkò, àdìpò n/a7, 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
Thorium has a face-centered cubic crystal structure
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
iso NA half-life DM DE (MeV) DP
228Th trace 1.9116 years α 5.520 224Ra
229Th syn 7340 years α 5.168 225Ra
230Th trace 75380 years α 4.770 226Ra
231Th trace 25.5 hours β 0.39 231Pa
232Th 100% 1.405×1010 years α 4.083 228Ra
234Th trace 24.1 days β 0.27 234Pa
· r

Tóríọ̀m tabi Thorium je apilese kemika to ni ami-idamo Th ati nomba atomu 90.

Thorium je onide alagbararadio to sele ladanida.


Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81th edition, CRC press.