(a) A transition element X has electronic configuration [Ar] 4s² 3d³. Predict its likely oxidation states.
(b) Complete the reaction mentioning all the products formed :

(c) Account for the following :
(i) In the 3d transition series, zinc has the lowest enthalpy of atomisation.
(ii) Cu⁺ ion 1s unstable in aqueous solution.
(iii) Actinoids show more number of oxidation states than lanthanoids.

Solution

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