Uranium Elemental Symbol

French German Italian Portuguese Spanish Swedish
D'uranium Uran Uranio De urânio Uranio Uran

Uranium Bohr ModelUranium is a Block F, Group 3, Period 7 element. The number of electrons in each of Uranium's shells is 2, 8, 18, 32, 21, 9, 2 and its electron configuration is [Rn] 5f3 6d1 7s2. The uranium atom has a radius of 138.5.pm High Purity (99.999%) Uranium Oxide (UO) Powderand it's Van der Waals radius is 186.pm. In its elemental form, CAS 7440-61-1, uranium has a silvery gray metallic appearance. Uranium was discovered by Martin Heinrich Klaproth in 1789. It was first isolated by Eugène-Melchior Péligot in 1841. The name Uranium originates from the planet Uranus.

Uranium in its depleted and unenriched forms has numerous commercial applications due to its great density and its bright yellow-green color in glass and ceramics. Because of its great density it has found military applications in armor piercing armaments and in protective shielding. Uranyl Nitrate and Uranyl Acetate are used in medical and analytical laboratories. Uranium is harmful both through its radioactivity and chemical toxicity. Uranium information, including technical data, safety data and its high purity properties, research, applications and other useful facts are discussed below. Scientific facts such as the atomic structure, ionization energy, abundance on earth, conductivity and thermal properties are included.

  • Properties
  • Safety Data
  • Products
  • Research
  • Isotopes
  • Other Elements

Uranium Properties

Symbol: U Melting Point: 1135 oC, 2075 oF, 1408.15 K
Atomic Number: 92 Boiling Point: 4131 oC, 7467.8 oF, 4404.15 K
Atomic Weight: 238 Density: 19050 kg m-3
Element Category: Actinide Liquid Density @ Melting Point: 17.3 g·cm−3
Group, Period, Block: n/a, 7, f Specific Heat: N/A
    Heat of Vaporization 417.1 kJ·mol−1
CHEMICAL STRUCTURE Heat of Fusion 9.14 kJ·mol−1
Electrons: 92 Thermal Conductivity: 27.5 W·m−1·K−1
Protons: 92 Thermal Expansion: (25 °C) 13.9 µm·m−1·K−1
Neutrons: 146 Electrical Resistivity: (0 °C) 0.280 µΩ·m
Electron Configuration: [Rn] 5f36d17s2 Electronegativity: 1.38 (Pauling scale)
Atomic Radius: 156 pm Tensile Strength: N/A
Covalent Radius: 196±7 pm Molar Heat Capacity: 27.665 J·mol−1·K−1
Van der Waals radius: 186 pm Young's Modulus: 208 GPa
Oxidation States: 6, 5, 4 Shear Modulus: 111 GPa
Phase: Solid  Bulk Modulus: 100 GPa
Crystal Structure: orthorhombic Poisson Ratio: 0.23
Magnetic Ordering: paramagnetic Mohs Hardness: N/A
1st Ionization Energy: 597.6 kJ·mol−1 Vickers Hardness: N/A
2nd Ionization Energy: 1420 kJ·mol−1 Brinell Hardness: N/A
3rd Ionization Energy: N/A Speed of Sound: (20 °C) 3155 m·s−1
CAS Number: 7440-61-1 Abundance in typical human body, by weight: N/A
ChemSpider ID: 22425 Abundance in typical human body, by atom: N/A
PubChem CID: 23989 Abundance in universe, by weight: N/A
MDL Number: N/A Abundance in universe, by atom: N/A
EC Number: N/A Discovered By: Martin Heinrich Klaproth
Beilstein Number: N/A Discovery Date: 1789
SMILES Identifier: [U]  
InChI Identifier: InChI=1S/U Other Names: D'uranium, Uran, Uranio

Recent Research & Development for Uranium

  • O.S. Vălu, D. Staicu, O. Beneš, R.J.M. Konings, P. Lajarge, Heat capacity, thermal conductivity and thermal diffusivity of uranium–americium mixed oxides, Journal of Alloys and Compounds, Volume 614, 25 November 2014
  • M. Mohapatra, B. Rajeswari, R.M. Kadam, M. Kumar, T.K. Seshagiri, N.K. Porwal, S.V. Godbole, V. Natarajan, Investigation of uranium luminescence in SrB4O7 matrix by time resolved photoluminescence, thermally stimulated luminescence and electron spin resonance spectroscopy, Journal of Alloys and Compounds, Volume 611, 25 October 2014
  • Sangjoon Ahn, Sandeep Irukuvarghula, Sean M. McDeavitt, Thermophysical investigations of the uranium–zirconium alloy system, Journal of Alloys and Compounds, Volume 611, 25 October 2014
  • Elinor C. Spencer, Nancy L. Ross, Robert G. Surbella III, Christopher L. Cahill, The influence of pressure on the structure of a 2D uranium(VI) carboxyphosphonoate compound, Journal of Solid State Chemistry, Volume 218, October 2014
  • S. Cohen, M.H. Mintz, S. Zalkind, A. Seibert, T. Gouder, N. Shamir, Water chemisorption on a sputter deposited uranium dioxide film — Effect of defects, Solid State Ionics, Volume 263, 1 October 2014
  • M.S. Henriques, D. Berthebaud, J.C. Waerenborgh, E.B. Lopes, M. Pasturel, O. Tougait, A.P. Gonçalves, A novel ternary uranium-based intermetallic U34Fe4−xGe33: Structure and physical properties, Journal of Alloys and Compounds, Volume 606, 5 September 2014
  • Poonam Verma, Shiny S. Kumar, R.M. Sawant, B.S. Tomar, K.L. Ramakumar, Synchronous derivative fluorimetric determination of boron in Uranium fuel samples, Journal of Luminescence, Volume 153, September 2014
  • I.O. Usov, R.M. Dickerson, P.O. Dickerson, D.D. Byler, K.J. McClellan, Uranium dioxide films with xenon filled bubbles for fission gas behavior studies, Journal of Nuclear Materials, Volume 452, Issues 1–3, September 2014
  • Daniel J. Gregg, Zhaoming Zhang, Gordon J. Thorogood, Brendan J. Kennedy, Justin A. Kimpton, Grant J. Griffiths, Paul R. Guagliardo, Gregory R. Lumpkin, Eric R. Vance, Cation antisite disorder in uranium-doped gadolinium zirconate pyrochlores, Journal of Nuclear Materials, Volume 452, Issues 1–3, September 2014
  • Megan E. Hoover, Raymond Atta-Fynn, Asok K. Ray, Surface properties of uranium dioxide from first principles, Journal of Nuclear Materials, Volume 452, Issues 1–3, September 2014

Uranium Isotopes

Uranium has two primordial isotopes with long half-lifes: 235U and 238U. Both of these are found in the earth's crust. It has no stable isotopes.