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Uranium |
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Pípè | /jʊəˈreɪniəm/ (ewr-AY-nee-əm) |
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Ìhànsójú | silvery gray metallic; corrodes to a spalling black oxide coat in air |
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Ìwúwo átọ̀mù Ar, std(U) | 238.02891(3)[1] |
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Uranium ní orí tábìlì àyè |
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Nọ́mbà átọ̀mù (Z) | 92 |
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Ẹgbẹ́ | group n/a |
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Àyè | àyè 7 |
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Àdìpọ̀ | Àdìpọ̀-f |
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Ẹ̀ka ẹ́límẹ́ntì | Actinide |
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Ìtò ẹ̀lẹ́ktrọ́nù | [Rn] 5f3 6d1 7s2 |
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Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 18, 32, 21, 9, 2 |
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Àwọn ohun ìní ara |
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Ìfarahàn at STP | solid |
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Ìgbà ìyọ́ | 1405.3 K (1132.2 °C, 2070 °F) |
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Ígbà ìhó | 4404 K (4131 °C, 7468 °F) |
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Kíki (near r.t.) | 19.1 g/cm3 |
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when liquid (at m.p.) | 17.3 g/cm3 |
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Heat of fusion | 9.14 kJ/mol |
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Heat of | 417.1 kJ/mol |
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Molar heat capacity | 27.665 J/(mol·K) |
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pressure
P (Pa)
|
1
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10
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100
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1 k
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10 k
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100 k
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at T (K)
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2325
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2564
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2859
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3234
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3727
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4402
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Atomic properties |
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Oxidation states | +1, +2, +3,[2] +4, +5, +6 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
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Electronegativity | Pauling scale: 1.38 |
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Atomic radius | empirical: 156 pm |
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Covalent radius | 196±7 pm |
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Van der Waals radius | 186 pm |
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Spectral lines of uranium |
Other properties |
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Natural occurrence | primordial |
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Crystal structure | orthorhombic |
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Speed of sound thin rod | 3155 m/s (at 20 °C) |
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Thermal expansion | 13.9 µm/(m·K) (at 25 °C) |
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Thermal conductivity | 27.5 W/(m·K) |
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Electrical resistivity | 0.280 µ Ω·m (at 0 °C) |
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Magnetic ordering | paramagnetic |
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Young's modulus | 208 GPa |
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Shear modulus | 111 GPa |
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Bulk modulus | 100 GPa |
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Poisson ratio | 0.23 |
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CAS Number | 7440-61-1 |
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Main isotopes of uranium |
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Àdàkọ:Category-inline | references |