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    Ba

    Barium

    Alkaline Earth

    Atomic Number: 56 • Atomic Mass: 137.3300 u • Period: 6 • Group: 2

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s²
    Phase: Solid
    Electronegativity: 0.89
    Cesium (Cs)Lanthanum (La)
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    Physical & Chemical Properties

    Physical Properties

    • •Soft silvery metal
    • •Oxidizes in air
    • •High density
    Melting Point

    1000 K (726.85 °C, 1340.33 °F)

    Boiling Point

    2118 K (1844.85 °C, 3352.73 °F)

    Density

    3.594 g/cm³

    Electronegativity

    0.89 (Pauling scale)

    Chemical Properties

    • •Reacts with water
    • •Forms ionic compounds
    • •Strong reducing agent

    Electron Configuration

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

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