The element with which of the following outer electron configuration may exhibit the
Question:

The element with which of the following outer electron configuration may exhibit the largest number of oxidation states in its compounds : 

  1. $3 \mathrm{~d}^{7} 4 \mathrm{~s}^{2}$

  2. $3 \mathrm{~d}^{8} 4 \mathrm{~s}^{2}$

  3. $3 \mathrm{~d}^{5} 4 \mathrm{~s}^{2}$

  4. $3 \mathrm{~d}^{6} 4 \mathrm{~S}^{2}$


Correct Option: , 3

Solution:

$\mathrm{Mn} \longrightarrow \mathrm{Mn}^{+7}$

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