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    Cm

    Curium

    Actinide

    Atomic Number: 96 • Atomic Mass: 247.0000 u • Period: 7 • Group: 102

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f⁷ 6d¹
    Phase: Solid
    Electronegativity: 1.3
    Americium (Am)Berkelium (Bk)
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    Physical & Chemical Properties

    Physical Properties

    • •Silvery-white metal
    • •Highly radioactive
    • •Produces significant heat from decay
    Melting Point

    1613 K (1339.85 °C, 2443.73 °F)

    Boiling Point

    3383 K (3109.85 °C, 5629.73 °F)

    Density

    13.51 g/cm³

    Electronegativity

    1.3 (Pauling scale)

    Chemical Properties

    • •Forms predominantly Cm³⁺ ions
    • •Similar chemical behavior to gadolinium
    • •Reacts with air and water

    Electron Configuration

    1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f⁷ 6d¹

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