D-And F-Block Elements Ques 238

Question: Which one of the following has the maximum number of unpaired electrons

[UPSEAT 2001]

Options:

A) Mg2+

B) Ti3+

C) V3+

D) Fe2+

Show Answer

Answer:

Correct Answer: D

Solution:

No of unpaired electron in different ion are as under

Mg2+1s2,2s22p6,3s0=0

Ti3+1s2,2s22p6,3s23p63d1,4s0=1

V3+1s2,2s22p6,3s23p63d2,4s0=2

Fe2+1s2,2s2sp6,3s23p63d6,4s0=4



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