(a) Draw a picture that represents a crystalline solid at the atomic level. (b) Now draw a picture that represents an amorphous solid at the atomic level.

To draw a crystalline solid, start by drawing a repeating pattern of atoms in a square grid. This represents the regular, periodic arrangement of atoms in a crystalline solid. The atoms in the structure should be drawn equidistant from each other, as they are in a regular arrangement. It can be helpful to draw lines connecting the atoms to show their connections and relationships.

To draw an amorphous solid, start by drawing atoms randomly placed throughout the space without any specific pattern or order. The atoms in an amorphous solid are not arranged in any particular manner and can be of varying distances from one another. It is important to show that there is no clear repeating pattern or order in the atomic arrangement. Connections between atoms can also be drawn but should appear irregular and not form any regular pattern. Remember that these drawings are simplified representations of the atomic structures in solids and are meant to show the key differences between crystalline and amorphous structures. Real atomic structures can be much more complex, but these drawings help to communicate the key ideas.