The formal charge is the "charge" an element would have in a molecule or ion if all of the bonding electrons were shared equally between atoms. :ö-ci-ö:Based on the Lewis structure given, the formal charge on the central chlorine atom is The formal charge is the "charge" an element would have in a molecule or ion if all of the bonding electrons were shared equally between atoms. : Based on the Lewis structure given, the formal charge on the central oxygen atom is