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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)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    History

    Barium has been known since ancient times

    Historical Timeline

    First isolated via electrolysis

    Compounds known since ancient times