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    Bk

    Berkelium

    Actinide

    Atomic Number: 97 • 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 5f⁹
    Phase: Solid
    Electronegativity: 1.3
    Curium (Cm)Californium (Cf)
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    Physical & Chemical Properties

    Physical Properties

    • •Silvery-white radioactive metal
    • •Highly radioactive
    • •Similar to other actinides
    Melting Point

    1259 K (985.85 °C, 1806.53 °F)

    Boiling Point

    2900 K (2626.85 °C, 4760.33 °F)

    Density

    14.79 g/cm³

    Electronegativity

    1.3 (Pauling scale)

    Chemical Properties

    • •Forms Bk³⁺ and Bk⁴⁺ ions
    • •Berkelium(III) compounds are green
    • •Resembles terbium chemically

    Electron Configuration

    1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f⁹

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