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Question

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


  1. V3+
     

  2. Mg2+
     

  3. Ti3+
     

  4. Fe2+


Solution

The correct option is D

Fe2+


Mg2+=1s22s22p6 =no unpaired electron
Ti3+=1s22s22p63s23p63d1=one unpaired electron
V3+=1s22s22p63s23p63d2 =two unpaired electron
Fe2+=1s22s22p63s23p63d6 =four unpaired electron

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