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    Sr

    Strontium

    Alkaline Earth

    Atomic Number: 38 • Atomic Mass: 87.6200 u • Period: 5 • Group: 2

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s²
    Phase: Solid
    Electronegativity: 0.95
    Rubidium (Rb)Yttrium (Y)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    History

    Strontium has been known since ancient times

    Historical Timeline

    Discovered in minerals from lead mines near Strontian, Scotland

    Identified as a new element by Crawford in 1790

    Isolated as a metal by Humphry Davy in 1808 through electrolysis