D-And F-Block Elements Ques 238
Question: Which one of the following has the maximum number of unpaired electrons
[UPSEAT 2001]
Options:
A) $ M{{g}^{2+}} $
B) $ T{{i}^{3+}} $
C) $ {{V}^{3+}} $
D) $ F{{e}^{2+}} $
Show Answer
Answer:
Correct Answer: D
Solution:
No of unpaired electron in different ion are as under
$ M{{g}^{2+}}\to 1s^{2},2s^{2}2p^{6},3s^{0}=0 $
$ T{{i}^{3+}}\to 1s^{2},2s^{2}2p^{6},3s^{2}3p^{6}3d^{1},4s^{0}=1 $
$ {{V}^{3+}}\to 1s^{2},2s^{2}2p^{6},3s^{2}3p^{6}3d^{2},4s^{0}=2 $
$ F{{e}^{2+}}\to 1s^{2},2s^{2}sp^{6},3s^{2}3p^{6}3d^{6},4s^{0}=4 $
