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Which of the following has the maximum number of unpaired electrons ?

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Which of the following has the maximum number of unpaired electrons ?

(a) Mg2+

(b)  Ti3+

(c) V3+

(d) Fe2+

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1 Answer

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Best answer

Correct option (a) Mg2+

Explanation:

The electronic configuration of the given ions are as follows.

12Mg2+ =  1s2 , 2s2 2p6 (No unpaired electron)

22Ti3+ = 1s2 , 2s2 2p6,3s23p63d1

(One unpaired electron)

23V3+ = 1s2 , 2s2 2p6,3s23p63d2 (Two unpaired elcctrons)

26Fe2+ = 1s2 , 2s2 2p6,3s23p63d6 (Four unpaired electrons)

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