A binary ionic compound is composed of two elements, one of which is a metal and the other is a non-metal. The metal atom loses electrons to the non-metal atom, resulting in the formation of positively charged metal ions and negatively charged non-metal ions. These ions are then attracted to each other by electrostatic forces to form an ionic compound.

A ternary compound is composed of three elements. It can be an ionic compound or a covalent compound. In an ionic ternary compound, one element is a metal, and the other two elements are non-metals. The metal atom loses electrons to the non-metal atoms, resulting in the formation of positively charged metal ions and negatively charged non-metal ions. These ions are then attracted to each other by electrostatic forces to form the ternary compound.

In a covalent ternary compound, the atoms are held together by covalent bonds, which are formed by the sharing of electrons between atoms.

Here are some examples of binary ionic compounds and ternary compounds:

* Binary ionic compounds: NaCl (sodium chloride), CaO (calcium oxide), MgS (magnesium sulfide)

* Ternary ionic compounds: CaCO3 (calcium carbonate), NaNO3 (sodium nitrate), K2SO4 (potassium sulfate)

* Ternary covalent compounds: H2O (water), CO2 (carbon dioxide), NH3 (ammonia)