Answer: Among these options, the formula that represents an ionic compound is E) BaI2.
Explanation: Ionic compounds are compounds that are formed through the combination of cations (positively charged ions) and anions (negatively charged ions).
BaI2 represents barium iodide. Ba represents barium, which is a metal, and I represents iodine, which is a non-metal. When barium (Ba) loses two electrons to become a cation Ba2+ and iodine (I) gains two electrons to become an anion I-, they form an ionic compound with the formula BaI2.