The principal quantum number for the outermost electrons in a Cl atom in the ground state is .

The principal quantum number for the outermost electrons in a Cl atom in the ground state is 3.

Explanation:

By using the Pauling distribution the chlorine atom has an electronic set of

With n=3 for an orbital S, l = 0 , ml = 0 and ms = ± 1/2

Therefore the final answer is 3

sorry i was late, but i don't know what assignment your talking about, i'm in flvs as well, im in earth space science. but u are behind pace bc every class should be in the 3's or 4'