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| Uranium
|
92U
|
|
|
| Ìhànsójú
|
silvery gray metallic; corrodes to a spalling black oxide coat in air
|
| Àwọn ìdámọ́ wíwọ́pọ̀
|
| Orúkọ, àmì-ìdámọ́, nọ́mbà
|
uranium, U, 92
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| Ẹ̀ka ẹ́límẹ̀nti
|
actinide
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| Ẹgbẹ́, àsìkò, àdìpò
|
n/a, 7, f
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| Ìwúwo átọ́mù
|
238.02891(3)
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| Ìtòléra ẹ̀lẹ́ktrónì
|
[Rn] 5f3 6d1 7s2
2, 8, 18, 32, 21, 9, 2
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| Physical properties
|
| Phase
|
solid
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| Density (near r.t.)
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19.1 g·cm−3
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| Liquid density at m.p.
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17.3 g·cm−3
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| Melting point
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1405.3 K, 1132.2 °C, 2070 °F
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| Boiling point
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4404 K, 4131 °C, 7468 °F
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| Heat of fusion
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9.14 kJ·mol−1
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| Heat of vaporization
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417.1 kJ·mol−1
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| Molar heat capacity
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27.665 J·mol−1·K−1
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| Vapor pressure
|
| P (Pa)
|
1
|
10
|
100
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1 k
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10 k
|
100 k
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| at T (K)
|
2325
|
2564
|
2859
|
3234
|
3727
|
4402
|
|
| Atomic properties
|
| Oxidation states
|
6, 5, 4, 3[1]
(weakly basic oxide)
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| Electronegativity
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1.38 (Pauling scale)
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| Ionization energies
|
1st: 597.6 kJ·mol−1
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| 2nd: 1420 kJ·mol−1
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| Atomic radius
|
156 pm
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| Covalent radius
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196±7 pm
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| Van der Waals radius
|
186 pm
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| Miscellanea
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| Crystal structure
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orthorhombic
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| Magnetic ordering
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paramagnetic
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| Electrical resistivity
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(0 °C) 0.280 µΩ·m
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| Thermal conductivity
|
27.5 W·m−1·K−1
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| Thermal expansion
|
(25 °C) 13.9 µm·m−1·K−1
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| Speed of sound (thin rod)
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(20 °C) 3155 m·s−1
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| Young's modulus
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208 GPa
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| Shear modulus
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111 GPa
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| Bulk modulus
|
100 GPa
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| Poisson ratio
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0.23
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| CAS registry number
|
7440-61-1
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| Àwọn ísótòpù dídúró jùlọ
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| Main article: Àwọn ísótòpù uranium
|
|
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| · r
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Ùráníọ̀m tabi Uranium je apilese kemika onide bi fadaka funfun ninu eseese aktinidi ti tabili igba to ni nomba atomu 92. O ni ami-idamo kemika U. Atomu uraniom kan ni 92 awon protoni 92 ati awon elektroni 92.
- ↑ The Chemistry of the Actinide and Transactinide Elements: Third Edition by L.R. Morss, N.M. Edelstein, J. Fuger, eds. (Netherlands: Springer, 2006.)
