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    U

    Uranium

    Actinide

    Atomic Number: 92 • Atomic Mass: 238.0300 u • Period: 7 • Group: 102

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f³ 6d¹
    Phase: Solid
    Electronegativity: 1.38
    Protactinium (Pa)Neptunium (Np)
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    Physical & Chemical Properties

    Physical Properties

    • •Silver-gray metal
    • •Dense and malleable
    • •Slightly radioactive
    Melting Point

    1405.3 K (1132.15 °C, 2069.87 °F)

    Boiling Point

    4404 K (4130.85 °C, 7467.53 °F)

    Density

    19.1 g/cm³

    Electronegativity

    1.38 (Pauling scale)

    Chemical Properties

    • •Forms many colored compounds
    • •Multiple oxidation states (+3 to +6)
    • •Reacts with most non-metals

    Electron Configuration

    1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f³ 6d¹

    Electron configuration describes how electrons are distributed in atomic orbitals, showing how they are arranged in energy levels and subshells.