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Among the following the incorrect statement about transition metals is
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The correct answer is:
$\mathrm{Mn}^{3+}$ is more stable than $\mathrm{Mn}^{2+}$
$\mathrm{Mn}=[\mathrm{Ar}] 3 \mathrm{~d}^5 4 \mathrm{~s}^2$
$$
\mathrm{Mn}^{2+}=[\mathrm{Ar}] 3 \mathrm{~d}^5 \text { and } \mathrm{Mn}^{3+}=[\mathrm{Ar}] 3 \mathrm{~d}^4
$$
Thus, the half-filled configuration of $\mathrm{Mn}^{2+}$ leads to its greater stability.
$$
\mathrm{Mn}^{2+}=[\mathrm{Ar}] 3 \mathrm{~d}^5 \text { and } \mathrm{Mn}^{3+}=[\mathrm{Ar}] 3 \mathrm{~d}^4
$$
Thus, the half-filled configuration of $\mathrm{Mn}^{2+}$ leads to its greater stability.
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