Question

why don't Sc and Zn have variable oxidation number​

Answer 1

Answer:

Explanation:

there are only Sc³+ in compounds and zinc appears as Zn²⁺ in almost all of its compounds (except by exotic and very unstable Zn2+2 cation)).

Among elements between scandium and zinc, manganese shows the greatest number of oxidation states

Answer 2

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Transition metals are those which have at least one oxidation state leading to an incomplete 'd' orbital. Scandium does not fall into this category since it only exhibits oxidation state, with a completely unfilled '3d' orbital.

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