One important difference between covalent and ionic bonds is that: select one: a. in covalent bonds two atoms share electrons while in ionic bonds two atoms of opposite charge are attracted to each other. b. ionic bonds only occur among water-soluble elements. c. in ionic bonds two atoms share electrons, while in covalent bonds one atom gives one or more electrons to the other atom. d. in ionic bonds both protons and electrons can be shared while in covalent bonds only electrons can be shared. e. ionic bonds are much stronger than covalent bonds.