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# Which of the following ions has the maximum magnetic moment?

$\begin{array}{1 1} (1) Mn^{2+} \quad (2) Fe^{2+} \quad (3) Ti^{2+} \quad (4) Cr^{2+} \end{array}$

Answer: $Mn^{2+}$
$Mn^{2+}$ has the maximum number of unpaired electrons (5) and hence has the maximum magnetic moment.
edited Aug 4, 2014