Chem 101: understanding the structure of molecules and its importance. As i have stated in a previous lesson (lesson 6), the type of bond that a molecule forms is not the only factor that goes into account when it comes to the other physical properties of molecules. The structure of the molecule determines greatly how easy it is to break it. Let"s take a real world example first before getting all science talk. With a little push, person 1"s house would be easily destroyed, as well as person 2"s, but person 3 would probably be harder to destroy with little effort. But they all used the same materials, so why is person 3"s stronger than 1 and 2? well that is because of how it was built, or in other words its structure. Now let"s take a science example of graphite and diamond. Well that is, again, because of its structure.