Compare and contrast the uses of the iron triad and the use of the coinage metals

he iron triad has the most variable oxidation states from +6, etc. The coinage metals have oxidation states of +1 except for copper which can also be +2. The zinc group have common oxidation states of +2 except for mercury which can also have +1. The coinage and zinc groups cannot have oxidation states greater than 2 under normal conditions.

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