Crystalline solids 1. The internal arrangement of particles is well defined. The molecules are lined up in a very particular order. 2. They possess sharp melting points. 3. NaCl and NaF are examples of Crystalline solids.
Amorphous solids 1- The internal arrangement of particles is not well defined. Molecules are not in a particular arrangement. There is no regularity in their form. 2. They do not possess sharp melting points. 3. Glass, rubber and plastics are examples of Amorphous solids..
