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On what ground can you say that scandium...

On what ground can you say that scandium `(Z=21)` is a transition element but zinc `(Z=30)` is not?

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On the basis of incompletely filled 3d orbitals in case of scandium (`3d^(1)`) and completely filled in case of Zn (`3d^(10)`), they are considered transition and non-transition elements respectively.
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(a) Silver atom has completely filled 'd' orbitals (4d^10) in its ground state. How can you say that it is a transition element ? (b) Actinoids exhibit a large number of oxidation states in comparison to corresponding members of Lanthanoid series. Why?

Explain why zinc is not rgardede as a transition element.

Common oxidation state of Scandium, a transition element is /are (At. No =21)