Back to Elements
    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

    Overview

    Barium is the chemical element with the symbol Ba and atomic number 56. It belongs to the Alkaline Earth group and is located in period 6 of the periodic table. It exists as a solid under standard conditions.

    Basic Information

    • Symbol:Ba
    • Atomic Number:56
    • Atomic Mass:137.3300 u
    • Group:2
    • Period:6
    • Category:Alkaline Earth
    • Phase at STP:Solid
    • Electronegativity:0.89 (Pauling scale)

    Key Facts

    Fun Fact #1

    Named from Greek 'barys' meaning heavy

    Fun Fact #2

    Compounds used in stomach X-rays

    Common Uses

    • Medical imaging
    • Fireworks
    • Drilling fluids