Correct Response: C. The most common types of chemical bonds between elements in the formation of compounds are covalent and ionic bonds. Covalent bonds involve the sharing of electrons between molecules and ionic bonds involve the transfer of electrons between molecules. Covalent and ionic bonds do not involve the exchange or combination of protons (A), a magnetic attraction between opposite poles of atoms (B), or an electrical attraction between protons and neutrons in different types of atoms (D).