Atomic Structure - Result Question 53

####29. Which of the following has the maximum number of unpaired electrons?

(1996, 1M)

(a) Mg2+

(b) Ti3+

(c) V3+

(d) Fe2+

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Solution:

  1. Mg2+=1s22s22p6 no unpaired electron

Ti3+=1s22s22p63s23p63d1 one unpaired electron

V3+=1s22s22p63s23p63d2 two unpaired electrons

Fe2+=1s22s22p63s23p63d6 four unpaired electrons



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