Uranium, 92U
Two hands in brown gloves holding a blotched gray disk with a number 2068 hand-written on it
Uranium
Pípè /jʊəˈrniəm/ (ewr-AY-nee-əm)
Ìhànsójúsilvery gray metallic; corrodes to a spalling black oxide coat in air
Ìwúwo átọ̀mù Ar, std(U)238.02891(3)[1]
Uranium ní orí tábìlì àyè
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
Nd

U

(Uqb)
protactiniumuraniumneptunium
Nọ́mbà átọ̀mù (Z)92
Ẹgbẹ́group n/a
Àyèàyè 7
Àdìpọ̀Àdìpọ̀-f
Ẹ̀ka ẹ́límẹ́ntì  Actinide
Ìtò ẹ̀lẹ́ktrọ́nù[Rn] 5f3 6d1 7s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan2, 8, 18, 32, 21, 9, 2
Àwọn ohun ìní ara
Ìfarahàn at STPsolid
Ìgbà ìyọ́1405.3 K ​(1132.2 °C, ​2070 °F)
Ígbà ìhó4404 K ​(4131 °C, ​7468 °F)
Kíki (near r.t.)19.1 g/cm3
when liquid (at m.p.)17.3 g/cm3
Heat of fusion9.14 kJ/mol
Heat of 417.1 kJ/mol
Molar heat capacity27.665 J/(mol·K)
 pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 2325 2564 2859 3234 3727 4402
Atomic properties
Oxidation states+1, +2, +3,[2] +4, +5, +6 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
ElectronegativityPauling scale: 1.38
Atomic radiusempirical: 156 pm
Covalent radius196±7 pm
Van der Waals radius186 pm
Color lines in a spectral range
Spectral lines of uranium
Other properties
Natural occurrenceprimordial
Crystal structureorthorhombic
Orthorhombic crystal structure for uranium
Speed of sound thin rod3155 m/s (at 20 °C)
Thermal expansion13.9 µm/(m·K) (at 25 °C)
Thermal conductivity27.5 W/(m·K)
Electrical resistivity0.280 µ Ω·m (at 0 °C)
Magnetic orderingparamagnetic
Young's modulus208 GPa
Shear modulus111 GPa
Bulk modulus100 GPa
Poisson ratio0.23
CAS Number7440-61-1
Main isotopes of uranium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct
232U syn 68.9 y α & SF 5.414 228Th
233U syn 159,200 y SF & α 4.909 229Th
234U 0.0054% 245,500 y SF & α 4.859 230Th
235U 0.7204% 7.038×108 y SF & α 4.679 231Th
236U trace 2.342×107 y SF & α 4.572 232Th
238U 99.2742% 4.468×109 y SF & α 4.270 234Th
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Àdàkọ:Sandbox other

  1. 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. 
  2. The Chemistry of the Actinide and Transactinide Elements (3rd ed.). Netherlands: Springer. 2006. ISBN 978-9048131464. 
  3. The Chemistry of the Actinide and Transactinide Elements: Third Edition by L.R. Morss, N.M. Edelstein, J. Fuger, eds. (Netherlands: Springer, 2006.)