In which of the following pairs,

eSaral Updated on:
Question:

In which of the following pairs, the outer most electronic configuration will be the same?

  1. $\mathrm{Fe}^{2+}$ and $\mathrm{Co}^{+}$

  2. $\mathrm{Cr}^{+}$and $\mathrm{Mn}^{2+}$

  3. $\mathrm{Ni}^{2+}$ and $\mathrm{Cu}^{+}$

  4. $\mathrm{V}^{2+}$ and $\mathrm{Cr}^{+}$

Correct Option: , 2

Solution:

$\mathrm{Cr}^{+} \rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^{5}$

$\mathrm{Mn}^{2+} \Rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^{5}$

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