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    Si

    Silicon

    Metalloid

    Atomic Number: 14 • Atomic Mass: 28.0850 u • Period: 3 • Group: 14

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p²
    Phase: Solid
    Electronegativity: 1.9
    Aluminum (Al)Phosphorus (P)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    History

    Silicon has been known since ancient times

    Historical Timeline

    First identified by Antoine Lavoisier in 1787 as an element

    Amorphous silicon first isolated by Berzelius in 1824

    First prepared in crystalline form in 1854

    Semiconductor properties recognized in early 20th century