question_answer

Out of \[C{{o}^{2+}}\] and \[N{{i}^{2+}}\] ions, which has lower magnetic moment?

Answer:

                  It may be noted that the magnetic moment is linked with the number of unpaired electrons present in an ion. Greater the number of such electrons, more will be magnetic moment. Configuration of both \[C{{o}^{2+}}\] and \[N{{i}^{2+}}\] ions are given as: \[C{{o}^{2+}}\,(Z=27);\,\,{{[Ar]}^{18}}\,3{{d}^{7}};\]\[N{{i}^{2+}}\,(Z=28);\,{{[Ar]}^{18}}3{{d}^{8}}\]. Since the number of unpaired electrons in \[C{{o}^{2+}}\] ion is more than in \[N{{i}^{2+}}\] ion it has therefore, more magnetic moment than \[N{{i}^{2+}}\] ion.