what happens when chlorine forms an ion?responsesit gains an electron and has an octet in the lowest energy level.it gains an electron and has an octet in the lowest energy level.it loses an electron and has an octet in its innermost shell.it loses an electron and has an octet in its innermost shell.it loses an electron and has an octet in the next-lowest energy level.it loses an electron and has an octet in the next-lowest energy level.it gains an electron and has an octet in its outer shell.