Question

which element has the following ground state electron configuration? 1s²2s²2p⁶3s²3p⁵ cl f s ar

Explanation:

Step1: Count total electrons

Add up exponents: $2 + 2+6 + 2+5=17$.

Step2: Match with element

Chlorine (Cl) has 17 electrons.

Answer:

A. Cl