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    Ce

    Cerium

    Lanthanide

    Atomic Number: 58 • Atomic Mass: 140.1200 u • Period: 6 • Group: 101

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹ 5d¹
    Phase: Solid
    Electronegativity: 1.12
    Lanthanum (La)Praseodymium (Pr)
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    Physical & Chemical Properties

    Physical Properties

    • •Silvery-white metal
    • •Soft and malleable
    • •Tarnishes in air
    Melting Point

    1068 K (794.85 °C, 1462.73 °F)

    Boiling Point

    3716 K (3442.85 °C, 6229.13 °F)

    Density

    6.77 g/cm³

    Electronegativity

    1.12 (Pauling scale)

    Chemical Properties

    • •Can have +3 or +4 oxidation states
    • •Strong oxidizing agent
    • •Reacts with water

    Electron Configuration

    1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹ 5d¹

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