question_answer 88)

  Although  and  ions have same number of unpaired electrons but the magnetic moment of  is 3.87 BM and that of  is 4.87 BM, Why?

Answer:

                    Magnetic moment of any metal ion can be decided on the basis of spin as well as orbital contribution of electron. Due to symmetrical electronic configuration, there is no orbital contribution in  ion. However, appreciable orbital contribution takes place in ion.