How does a covalent bond differ from an ionic bond? A. A covalent bond is formed when two atoms share one or more protons. An ionic bond is formed when one atom gives up one or more protons to another atom. B. A covalent bond is formed when one atom gives up one or more electrons to another atom. An ionic bond is formed when two atoms share one or more electrons. C. A covalent bond is formed when two atoms share one or more electrons. An ionic bond is formed when one atom gives up one or more electrons to another atom. D. A covalent bond is formed when one atom gives up one or more protons to another atom. An ionic bond is formed when two atoms share one or more protons.