Unknown element x is a metal that ionically bonds to sulfur. is the formula, x3s feasible? why or why not? a) it is feasible. the three metallic ions each receive an electron from sulfur. b) no, it is not feasible. sulfur cannot give three electrons to the metal since the sulfide ion has a -2 charge. c) no, it is not feasible. the metallic ion x only has one valence electron and the sulfide ion receives two electrons. d) no, it is not feasible. three metallic ions cannot provide the exact number of electrons that one sulfur needs for the ionic bond.