For which one of the following elements,the M | vedclass

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(C) The standard electrode potential for the reduction $M^{3+} + e^- \rightarrow M^{2+}$ depends on the stability of the resulting $M^{2+}$ ion.For $M

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$Mn$

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(C) The standard electrode potential for the reduction $M^{3+} + e^- \rightarrow M^{2+}$ depends on the stability of the resulting $M^{2+}$ ion.For $Mn^{3+} (d^4) \rightarrow Mn^{2+} (d^5)$,the $Mn^{2+}$ ion has a stable half-filled $d^5$ configuration,making the reduction highly favorable and the potential most positive.In contrast,$V^{3+} (d^2) \rightarrow V^{2+} (d^3)$ is less favorable because $V^{2+}$ is not as stable as $Mn^{2+}$.Therefore,the $M^{3+} \mid M^{2+}$ potential is most positive for $Mn$.

For which one of the following elements,the $M^{3+} \mid M^{2+}$ standard electrode potential is more positive?

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