Final answer:
Lewis Dot Structures show chemical reactions by illustrating valence electrons, electron transfer/sharing, bond formation, and atomic arrangements.
Step-by-step explanation:
Lewis Dot Structures can be used to show reactions between different chemical elements by representing the valence electrons of each element involved in the reaction (option A), by illustrating the transfer or sharing of electrons between elements (option B), by indicating the formation of chemical bonds (option C), and by demonstrating the arrangement of atoms in a molecule or compound (option D).
Lewis electron dot diagrams (or Lewis structures) are a useful tool for understanding the bonding between atoms in a molecule. They use dots to represent valence electrons around an atomic symbol, predicting the number of bonds that elements will form in a compound. These structures abide by the octet rule for elements in period 2 and beyond, which strive to have eight valence electrons through losing, gaining, or sharing electrons. Hydrogen is an exception, aiming for only two valence electrons.
When illustrating reactions, Lewis Structures are particularly informative in visualizing the mechanism of bond formation. For instance, with covalent bonds like in a chlorine molecule, a pair of electrons is shared and represented as two dots placed between the two chlorine symbols. This straightforward visualization assists in understanding how atoms connect and form stable structures.