We’re being asked to identify which of the given compounds contains both ionic and covalent bonds. Let’s first differentiate a covalent bond and an ionic bond.

• Covalent or Molecular Compound

▪ composed of more than one nonmetal together
▪ nonmetal + nonmetal = covalent bond

• Ionic Compound

▪ composed of a positive ion called a cation connected to a negative ion called an anion.
▪ positive ions (cations) are usually metals and negative ions (anion) are usually nonmetals

metal + nonmetal = ionic bond

▪ cations and anions can also be polyatomic ions (example: NH₄⁺, C­H₃COO^-, SO₄^2-)

Now let’s identify which of the given compounds contains both ionic and covalent bonds: