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    B

    Boron

    Metalloid

    Atomic Number: 5 • Atomic Mass: 10.8100 u • Period: 2 • Group: 13

    Electron Configuration: 1s² 2s² 2p¹
    Phase: Solid
    Electronegativity: 2.04
    Beryllium (Be)Carbon (C)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    History

    Boron has been known since ancient times

    Historical Timeline

    Discovered independently in 1808 by French chemists Gay-Lussac and Thénard and by British chemist Humphry Davy

    First isolated by American chemist W. Weintraub in 1909

    Known compounds used since ancient times in mummification and metallurgy