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    Ho

    Holmium

    Lanthanide

    Atomic Number: 67 • Atomic Mass: 164.9300 u • Period: 6 • Group: 101

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹¹
    Phase: Solid
    Electronegativity: 1.23
    Dysprosium (Dy)Erbium (Er)
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    Physical & Chemical Properties

    Physical Properties

    • •Silvery-white metal
    • •Soft and malleable
    • •Highest magnetic strength of any element
    Melting Point

    1734 K (1460.85 °C, 2661.53 °F)

    Boiling Point

    2993 K (2719.85 °C, 4927.73 °F)

    Density

    8.795 g/cm³

    Electronegativity

    1.23 (Pauling scale)

    Chemical Properties

    • •Forms trivalent compounds
    • •Reacts with dilute acids
    • •Oxidizes in air

    Electron Configuration

    1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹¹

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