Question

which group of the periodic table is the following element found in? ar4s^2 3d^2

Explanation:

Step1: Identify valence electrons

The electron - configuration is $[Ar]4s^{2}3d^{2}$. The valence electrons are in the $4s$ and $3d$ orbitals. The number of valence electrons is $2 + 2=4$.

Step2: Determine group number

For transition metals, the group number is related to the number of valence electrons. The element with $4$ valence electrons in the $d -$block is in group 4.

Answer:

Group 4