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    Rh

    Rhodium

    Transition Metal

    Atomic Number: 45 • Atomic Mass: 102.9100 u • Period: 5 • Group: 9

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s¹ 4d⁸
    Phase: Solid
    Electronegativity: 2.28
    Ruthenium (Ru)Palladium (Pd)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    History

    Rhodium has been known since ancient times

    Historical Timeline

    Discovered by William Hyde Wollaston in England shortly after his discovery of palladium

    Isolated from crude platinum ore

    Named for the rose color of its salts in solution