Chemistry-
General
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Question

Which of the following ions has the least magnetic moment

  1. C u to the power of plus 2 end exponent    
  2. N i to the power of plus 2 end exponent    
  3. C o to the power of plus 3 end exponent    
  4. F e to the power of plus 2 end exponent    

The correct answer is: C u to the power of plus 2 end exponent


    C u to the power of plus 2 end exponent
    S.NoIonElectronic configurationNo. of unpaired electrons
    (i)C u to the power of plus 2 end exponentd to the power of 9 end exponent1
    (ii)N i to the power of plus 2 end exponentd to the power of 8 end exponent2
    (iii)C o to the power of plus 2 end exponentd to the power of 7 end exponent3
    (iv)F e to the power of plus 2 end exponentd to the power of 6 end exponent4
    mu equals square root of n left parenthesis n plus 2 right parenthesis end root (magnetic moment)
    mu proportional to square root of n
    C u to the power of plus 2 end exponent there is only 1 unpaired electron so its magnetic moment is least.

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