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    P

    Phosphorus

    Nonmetal

    Atomic Number: 15 • Atomic Mass: 30.9740 u • Period: 3 • Group: 15

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p³
    Phase: Solid
    Electronegativity: 2.19
    Silicon (Si)Sulfur (S)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    History

    Phosphorus has been known since ancient times

    Historical Timeline

    Discovered by German alchemist Hennig Brand in 1669

    First element discovered that was not known in ancient times

    Discovered while attempting to create the philosopher's stone from urine

    White phosphorus was the first form discovered (glows in the dark)