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    Cd

    Cadmium

    Transition Metal

    Atomic Number: 48 • Atomic Mass: 112.4100 u • Period: 5 • Group: 12

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰
    Phase: Solid
    Electronegativity: 1.69
    Silver (Ag)Indium (In)
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    Physical & Chemical Properties

    Physical Properties

    • •Soft, bluish-white metal
    • •Malleable and ductile
    • •Low melting point (594.22 K or 321.07°C)
    • •Resistant to corrosion
    • •Good conductor of heat and electricity
    Melting Point

    594.22 K (321.07 °C, 609.93 °F)

    Boiling Point

    1040 K (766.85 °C, 1412.33 °F)

    Density

    8.69 g/cm³

    Electronegativity

    1.69 (Pauling scale)

    Chemical Properties

    • •Main oxidation state is +2
    • •Forms a thin oxide layer in air
    • •Dissolves readily in acids but not in alkalis
    • •Can form complex compounds
    • •Has high neutron absorption properties

    Electron Configuration

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

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