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    Br

    Bromine

    Halogen

    Atomic Number: 35 • Atomic Mass: 79.9040 u • Period: 4 • Group: 17

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁵
    Phase: Liquid
    Electronegativity: 2.96
    Selenium (Se)Krypton (Kr)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    Occurrence

    Bromine is found in various natural sources, including minerals, rocks, and the Earth's crust.

    • 77th most abundant element in Earth's crust (0.0003%)
    • Never found as free element due to high reactivity
    • Exists in seawater as bromide ions (about 65 ppm)
    • Found in brine wells and salt lakes
    • Salt deposits such as the Dead Sea and Searles Lake are rich in bromides