Figure 7
Three-dimensional printed models of (a) crystalline sodium chloride (table salt), (b) a sucrose (common sugar) molecule (without hydrogen bonds) and (c) a sucrose crystal. Models of these common household substances are utilized to explain concepts such as ionic, heteropolar, hydrogen and van der Waals bonding as well as crystals that contain either individual molecules (as in sugar) or cations and anions that are arranged in a charge balancing three-dimensional space lattice (as in table salt). (Reprinted with permission.) |