Final answer:
An ionic bond, not a covalent bond, is formed when electrons are transferred between two atoms. A covalent bond requires the sharing of electron pairs between atoms, as illustrated in Lewis electron dot diagrams.
Step-by-step explanation:
When electrons are transferred between two atoms, an ionic bond is formed, not a covalent bond. A covalent bond is established when two atoms share a pair of electrons, which occurs only between atoms of nonmetals. The shared electrons occupy a region of space between the two nuclei. For instance, a single covalent bond is created when two electrons, one from each atom, are shared between the same two atoms. A double covalent bond involves the sharing of four electrons between the same two atoms, while a triple covalent bond involves six electrons shared between the same two atoms. Lewis electron dot diagrams are typically used to illustrate these bonds in molecules.