Copper and zinc are the last two elements of the first row of transition metals (d-block). Interest in these elements arises because they are both strongly chalcophile and, thanks to a rich coordination chemistry, participate in a large number of important biological compounds and reactions. Copper has two isotopes, 63Cu and 65Cu with respective abundances of 69.174% and 30.826% in the reference metal SRM-NIST 976 (Shields et al. 1964). Zn has fi ve stable isotopes 64Zn, 66Zn, 67Zn, 68Zn, and 70Zn with average natural abundances of 48.63, 27.90, 4.10, 18.75, and...

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