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    Se

    Selenium

    Nonmetal

    Atomic Number: 34 • Atomic Mass: 78.9710 u • Period: 4 • Group: 16

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁴
    Phase: Solid
    Electronegativity: 2.55
    Arsenic (As)Bromine (Br)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    Applications

    Selenium has a wide range of applications in various industries, including:

    • Glass production
    • Photocopiers
    • Nutritional supplements