An element has $[\mathrm{Ar}] 3 d^1$ configuration in its +2 oxidation state. Its position in the periodic…
An element has $[\mathrm{Ar}] 3 d^1$ configuration in its +2 oxidation state. Its position in the periodic table is
period-3, group-3
period-3, group-7
period-4, group-3
period-3, group-9
Solution
Electronic configuration of the element in +2 oxidation state is $[\mathrm{Ar}] 3 \mathrm{~d}^1$. Its electronic configuration in neutral state:
$\text { [Ar] } 3 \mathrm{~d}^1 4 \mathrm{~s}^2$
Period $=$ Max. principal quantum no. $n=4$
Group $=$ Total number of valence shell electrons $=3$