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Question

Name a transition element which does not exhibit variable oxidation states.

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Solution

Transition element which does not exhibit variable oxidation states

All the d-blocks elements exhibit various valency or have variable oxidation number. But scandium does not show because scandium has partially filled d-orbitals in the ground state.


In the case of scandium, the number of electrons in the 3d and 4s orbital is 1 and 2 respectively. Removing three electrons from its d and s orbital forms a very stable inert gas configuration. It loses 1 electron from d orbital and 2 electrons from s orbital to form a Sc3+ ion.

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