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    IsotopeAtomic mass (Da)Isotopic abundance (amount fraction)
    103Rh 102.905 49(2)1

    Rhodium is a monoisotopic element and its atomic weight is determined solely by its isotope 103Rh. The Commission last revised the standard atomic weight of rhodium in 2017 based on the latest Atomic Mass Evaluation by IUPAP.

    SOURCE  Atomic weights of the elements: Review 2000 by John R de Laeter et al. Pure Appl. Chem. 2003 (75) 683-800
    © IUPAC 2003


    Ar(Rh) = 102.905 49(2) since 2017

    The name derives from the Greek rhodon for rose because of the rose color of dilute solutions of its salts. It was discovered by the English chemist and physicist William Hyde Wollaston in 1803 in a crude platinum ore.