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Periodic Table of Elements

Element Uranium - U

Comprehensive data on the chemical element Uranium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Uranium. Common chemical compounds are also provided for many elements. In addition technical terms are linked to their definitions and the menu contains links to related articles that are a great aid in one's studies.

Uranium Menu

• Uranium Page One
  • Overview of Uranium
  • Uranium's Name in Other Languages
  • Atomic Structure of Uranium
  • Chemical Properties of Uranium
  • Physical Properties of Uranium
  • Regulatory / Health
  • Who/When/Where/How
• Uranium Page Two
  • Nuclides / Isotopes
  • Potential Parent Nuclides
• Uranium Page Three
  • Common Chemical Compounds of Uranium

Overview of Uranium

• Atomic Number: 92
• Period: 7
• Series: Actinides

Uranium's Name in Other Languages

• Latin: Uranium
• Czech: Uran
• Croatian: Uranij
• French: Uranium
• German: Uran - r
• Italian: Uranio
• Norwegian: Uran
• Portuguese: Urânio
• Russian: Уран
• Spanish: Uranio
• Swedish: Uran

Atomic Structure of Uranium

• Atomic Radius:
• Atomic Volume: 12.59cm³/mol
• Covalent Radius: 1.42Å
• Cross Section (Thermal Neutron Capture) σ_a/barns: 7.57
• Crystal Structure: Orthorhombic

  

• Electron Configuration:

  1s² 2s²p⁶ 3s²p⁶d¹⁰ 4s²p⁶d¹⁰f¹⁴ 5s²p⁶d¹⁰f³ 6s²p⁶d¹ 7s²

• Electrons per Energy Level: 2,8,18,32,21,9,2

  Shell Model
  

• Ionic Radius: 0.52Å
• Filling Orbital: 5f³
• Number of Electrons (with no charge): 92
• Number of Neutrons (most common/stable nuclide): 146
• Number of Protons: 92
• Oxidation States: 6,5,4,3
• Valence Electrons: 5f³ 6d¹ 7s²

  Electron Dot Model
  

Chemical Properties of Uranium

• Electrochemical Equivalent: 1.4801g/amp-hr
• Electron Work Function: 3.63eV
• Electronegativity: 1.38 (Pauling); 1.2 (Allrod Rochow)
• Heat of Fusion: 8.52kJ/mol
• Incompatibilities:

  Carbon dioxide, carbon tetrachloride, nitric acid, fluorine

• Ionization Potential
  • First: 6.05
• Valence Electron Potential (-eV): 170

Physical Properties of Uranium

• Atomic Mass Average: 238.0289
• Boiling Point: 4407K 4134°C 7473°F
• Coefficient of lineal thermal expansion/K^-1: 0.0000134E^-6
• Conductivity

  Electrical: 0.038 10⁶/cm Ω
  Thermal: 0.276 W/cmK

• Density: 18.95g/cc @ 300K
• Description:

  A very heavy silvery-white radioactive metal.

• Elastic Modulus:
  • Bulk: 100/GPa
  • Rigidity: 111/GPa
  • Youngs: 208/GPa
• Enthalpy of Atomization: 489.5 kJ/mole @ 25°C
• Enthalpy of Fusion: 15.48 kJ/mole
• Enthalpy of Vaporization: 477 kJ/mole
• Flammablity Class: Combustible Solid
• Freezing Point: see melting point
• Hardness Scale
  • Brinell: 2400 MN m^-2
  • Mohs: 6
  • Vickers: 1960 MN m^-2
• Heat of Vaporization: 477kJ/mol
• Melting Point: 1405K 1132°C 2070°F
• Molar Volume: 12.49 cm³/mole
• Physical State (at 20°C & 1atm): Solid
• Specific Heat: 0.12J/gK
• Vapor Pressure = 1.19E-06Pa@1132°C

Regulatory / Health

• CAS Number
  • 7440-61-1 metal, pyrophoric
• UN/NA ID and ERG Guide Number
  • 2979  / 162 metal, pyrophoric
• RTECS: YR3490000
• NFPA 704
  • Health:
  • Fire:
  • Reactivity:
  • Special Hazard: Radioactive<
  • OSHA Permissible Exposure Limit (PEL)
    • TWA: 0.25 mg/m³
  • OSHA PEL Vacated 1989
    • TWA: 0.2 mg/m³
    • STEL: 0.6 mg/m³
  • NIOSH Recommended Exposure Limit (REL)
    • TWA: 0.2 mg/m³
    • STEL: 0.6 mg/m³
    • IDLH: 10 mg/m³ (Potential NIOSH carcinogen)
  • Routes of Exposure: Inhalation; Ingestion; Skin and/or eye contact
  • Target Organs: Skin, kidneys, bone marrow, lymphatic system
  • Levels In Humans:
    Note: this data represents naturally occuring levels of elements in the typical human, it DOES NOT represent recommended daily allowances.
    • Blood/mg dm^-3: n/a
    • Bone/p.p.m: n/a
    • Liver/p.p.m: n/a
    • Muscle/p.p.m: n/a
    • Daily Dietary Intake: n/a
    • Total Mass In Avg. 70kg human: n/a

  Who / Where / When / How

  • Discoverer: Martin J. Klaproth
  • Discovery Location: Berlin Germany
  • Discovery Year: 1789
  • Name Origin:

    From planet Uranus.

  • Abundance of Uranium:
    • Earth's Crust/p.p.m.: N/A
    • Seawater/p.p.m.: 0.00313
    • Atmosphere/p.p.m.: N/A
    • Sun (Relative to H=1E¹²): N/A
  • Sources of Uranium:

    Primary uranium bearing ores are uraninite, autunite, carnotite, samarskite (some varieties of samarskite contain up to 23% uranium) and torbernite. Annual world wide production is around 35,000 tons. Primary mining areas are in canada, Zaire, Czech Republic and USA.

  • Uses of Uranium:

    For many centuries it was used as a pigment for glass. Now it is used as a fuel in nuclear reactors and in nuclear bombs. Depleted Uranium is used in casings of armor piercing arterial shells, armor plating on tanks and as ballast in the wings of some large aircraft.

  • Additional Notes:

  Uranium Menu

  • Uranium Page One
    • Overview of Uranium
    • Uranium's Name in Other Languages
    • Atomic Structure of Uranium
    • Chemical Properties of Uranium
    • Physical Properties of Uranium
    • Regulatory / Health
    • Who/When/Where/How
  • Uranium Page Two
    • Nuclides / Isotopes
    • Potential Parent Nuclides
  • Uranium Page Three
    • Common Chemical Compounds of Uranium

  References

  A list of reference sources used to compile the data provided on our periodic table of elements can be found on the main periodic table page.

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