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    Pt

    Platinum

    Transition Metal

    Atomic Number: 78 • Atomic Mass: 195.0800 u • Period: 6 • Group: 10

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s¹ 4f¹⁴ 5d⁹
    Phase: Solid
    Electronegativity: 2.28
    Iridium (Ir)Gold (Au)
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    Physical & Chemical Properties

    Physical Properties

    • •Silvery-white appearance
    • •Malleable and ductile
    • •Excellent conductor
    Melting Point

    2041.4 K (1768.25 °C, 3214.85 °F)

    Boiling Point

    4098 K (3824.85 °C, 6916.73 °F)

    Density

    21.45 g/cm³

    Electronegativity

    2.28 (Pauling scale)

    Chemical Properties

    • •Highly resistant to corrosion
    • •Excellent catalyst
    • •Forms numerous coordination compounds

    Electron Configuration

    1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s¹ 4f¹⁴ 5d⁹

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