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    Gd

    Gadolinium

    Lanthanide

    Atomic Number: 64 • Atomic Mass: 157.2500 u • Period: 6 • Group: 101

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f⁷ 5d¹
    Phase: Solid
    Electronegativity: 1.2
    Europium (Eu)Terbium (Tb)
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    Physical & Chemical Properties

    Physical Properties

    • •Silvery-white metal
    • •Malleable and ductile
    • •Ferromagnetic
    Melting Point

    1585 K (1311.85 °C, 2393.33 °F)

    Boiling Point

    3546 K (3272.85 °C, 5923.13 °F)

    Density

    7.895 g/cm³

    Electronegativity

    1.2 (Pauling scale)

    Chemical Properties

    • •Forms trivalent compounds
    • •Moderate reactivity with oxygen and water
    • •Excellent neutron absorber

    Electron Configuration

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

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