Desrible the variableoxidation stateof 3dserieselements . – InterviewSolution

1.	Desrible the variableoxidation stateof 3dserieselements .
Answer» SOLUTION :(i)Thefirsttransitionmetalscandium exhibitsonly +3oxidatinstatebut allothertransitionelementsexhibitvariableoxidation statesby loosingelectrons from (n-1)orbitaland ns orbitalas the energydifferencebetweenthemis VERYSMALL. (ii)At the BEGINNINGOF theseries+3oxidationstateis stablebuttowardthe end+2oxidationstatebecomesstable. (iii) Thenumberof oxidationstatesincreaseswiththe NUMBEROF electronsavailableand itdecreasesas thenumberof pairedelectronsincreases. Hencethe firstand lastelementsshowlessnumberof oxidationstatesandthe middleelementswith morenumberof OXIDATIONSTATES.

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