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    Sb

    Antimony

    Metalloid

    Atomic Number: 51 • Atomic Mass: 121.7600 u • Period: 5 • Group: 15

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p³
    Phase: Solid
    Electronegativity: 2.05
    Tin (Sn)Tellurium (Te)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    History

    Antimony has been known since ancient times

    Historical Timeline

    Used in cosmetics and medicine in ancient Egypt around 3000 BCE

    Mentioned by Pliny the Elder in first century CE

    Formally classified as an element in 1789 by Lavoisier