Question

If an atom has electronic configuration 1s2 2s2 3s2 3p6 3d3 4s2

Answer 1

The element is Chlorine

Answer 2

Explanation:

The electronic configuration of an atom 1s2 2s1 2p6 3s2 3p6 3d3 4s2. In the configuration the last electron of the atom is filled in d sub-shell as 3d3. Thus this element belongs to d-block of the periodic table with group no. V