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    Ge

    Germanium

    Metalloid

    Atomic Number: 32 • Atomic Mass: 72.6300 u • Period: 4 • Group: 14

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p²
    Phase: Solid
    Electronegativity: 2.01
    Gallium (Ga)Arsenic (As)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    History

    Germanium has been known since ancient times

    Historical Timeline

    Predicted by Mendeleev in 1871 as 'eka-silicon'

    Discovered by Clemens Winkler in the mineral argyrodite

    Properties closely matched Mendeleev's predictions