An element has $d^5$ configuration. The total number of electron exchanges possible for it is
An element has $d^5$ configuration. The total number of electron exchanges possible for it is
$18$
$10$
$12$
$15$
Solution
The total number of electron exchanges possibility is $\frac{n(n-1)}{2}$ (where, $n$ is the number of shells).
By applying this formula for $d^5$ configuration we get,
$=\frac{5(5-1)}{2}=\frac{5 \times 4}{2}=\frac{20}{2}=10$