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    Sm

    Samarium

    Lanthanide

    Atomic Number: 62 • Atomic Mass: 150.3600 u • Period: 6 • Group: 101

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f⁶
    Phase: Solid
    Electronegativity: 1.17
    Promethium (Pm)Europium (Eu)
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    Physical & Chemical Properties

    Physical Properties

    • •Silver-white metal
    • •Moderate hardness
    • •Oxidizes in air
    Melting Point

    1345 K (1071.85 °C, 1961.33 °F)

    Boiling Point

    2067 K (1793.85 °C, 3260.93 °F)

    Density

    7.52 g/cm³

    Electronegativity

    1.17 (Pauling scale)

    Chemical Properties

    • •Can have +2 and +3 oxidation states
    • •Reacts with water
    • •Moderate reactivity

    Electron Configuration

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

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