The term "3 fecl2" in a balanced equation says a) that there are three iron(ii) ions and two chloride ions bonded together. b) that there are three iron(ii) ions and 6 chloride ions bonded together. c) that there are three formula units, each consisting of two chloride ions bonded to an iron(ii) ion. d) that there are three particles, each consisting of three iron atoms and 6 chlorine atoms.