Question

Sc, the first member of first transition series does not exhibit variable oxidation state. Why ?

Answer 1

Scandium outer configuration is 3d1 4s2 .it loses 1 electron from d orbital n 2 electrons from s orbital to form Sc3+ ion whose configuration is equivalent with argon which has a noble gas configuration. so it does not have many electrons in d orbital like manganese to show variable oxidation state.

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