Give reason : a) Cerium (Ce) exhibits +4 oxidation state. b) Actinoi – InterviewSolution

1.	Give reason : a) Cerium (Ce) exhibits +4 oxidation state. b) Actinoid contraction is greater from element to element than lanthanoid contraction.
Answer» Solution :a) Attaining extra stability of empty f ORBITAL OR `Ce^(+4)` is FAVOURED by its noble CONFIGURATION OR Stable noble gas configuration of Xenon. (b) Poor shielding by 5f ELECTRONS

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