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    Mg

    Magnesium

    Alkaline Earth

    Atomic Number: 12 • Atomic Mass: 24.3050 u • Period: 3 • Group: 2

    Electron Configuration: 1s² 2s² 2p⁶ 3s²
    Phase: Solid
    Electronegativity: 1.31
    Sodium (Na)Aluminum (Al)
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    Physical & Chemical Properties

    Physical Properties

    • •Lightweight, silvery-white metal
    • •Good electrical and thermal conductor
    • •Low density
    • •Relatively high melting point for its group
    Melting Point

    923 K (649.85 °C, 1201.73 °F)

    Boiling Point

    1363 K (1089.85 °C, 1993.73 °F)

    Density

    1.738 g/cm³

    Electronegativity

    1.31 (Pauling scale)

    Chemical Properties

    • •Highly reactive but less than alkali metals
    • •Forms protective oxide layer in air
    • •Reacts with water at room temperature (slowly)
    • •Burns with brilliant white light

    Electron Configuration

    1s² 2s² 2p⁶ 3s²

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