Calculate the number of unpaired electrons ...

NCERT Class XII Chemistry
Chapter - The d- and f-Block Elements
Questions with Solutions

Question : 24 of 49

Marks: +1, -0

Calculate the number of unpaired electrons in the following gaseous ions : Mn

^{3+}

, Cr

^{3+}

, V

^{3+}

and Ti

^{3+}

. Which one of these is the most stable in aqueous solution ?

Solution:

\mathrm{Mn}^{3+} - 3d^{4}4s^{0}\;

4 unpaired electrons

\mathrm{Cr}^{3+} - 3d^{3}4s^{0}\;

3 unpaired electrons

\mathrm{V}^{3+} - 3d^{2}4s^{0} \;\;

2 unpaired electrons

\mathrm{Ti}^{3+} - 3d^{1}4s^{0}\;

1 unpaired electrons

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