Hank discusses the arrangement of the atoms in crystalline solids and how their atomic arrangement differs from amorphous solids. He mentions that each category of solid's atomic arrangement affects its properties, from how it breaks to its appearance. He also describes a couple of types crystalline solids: ionic and molecular.
Hank explains polymers, describes some of their properties, and explains how they are formed. He also explains what you need to make a polymer: a molecule that can easily bond to another identical molecule at two points. Hank focuses on the polymer, Polyethylene, because it is the most common plastic in the world, and discusses its nomenclature.