Why do we use the term formula unit for ionic compounds instead of the term molecule? Select all that apply. A) In ionic compounds the ratio between cations and anions is given by the formula unit. The term is incorrect because ionic compounds exist as molecules.

B) In ionic compounds the ratio between cations and anions is given by the formula for the molecule.

C) lonic compounds consist of cations and anions present in a constant ratio.

D) lonic compounds consist of continuous arrays of cations and anions.