question_answer 71)

    Transition elements show magnetic moment due to spin and orbital motion of electrons.  Which of the following metallic ions have almost same spin only magnetic moment? (a)                                (b)           (c)                               (d)

Answer:

                    (a, d) Electronic configuration of ; Number of unpaired electrons = 3 Electronic configuration of ; Number of unpaired electrons -- 4 Electronic configuration of ; Number of unpaired electrons =? 5 Electronic configuration of ; Number of unpaired electrons = 3 Hence, it is clearly seen that both  and  have same number of unpaired electrons. i.e., 3.