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    Pu

    Plutonium

    Actinide

    Atomic Number: 94 • Atomic Mass: 244.0000 u • Period: 7 • Group: 102

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f⁶
    Phase: Solid
    Electronegativity: 1.28
    Neptunium (Np)Americium (Am)
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    Physical & Chemical Properties

    Physical Properties

    • •Silvery-white metal
    • •Six different crystal structures (allotropes)
    • •Expands when solidifying
    Melting Point

    912.5 K (639.35 °C, 1182.83 °F)

    Boiling Point

    3505 K (3231.85 °C, 5849.33 °F)

    Density

    19.816 g/cm³

    Electronegativity

    1.28 (Pauling scale)

    Chemical Properties

    • •Multiple oxidation states (+3 to +7)
    • •Highly reactive
    • •Forms colored compounds

    Electron Configuration

    1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f⁶

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