Graphs and Networks of Molecular Components

When you kind of think about chemistry in terms of this kind of ball and stick type model, you've just got atoms and bonds. So for example, I don't know, you could represent a nine going to embarrass myself with my poor chemistry, but a sort of a simple class of molecules are the alkane molecules which consist of a sequence of carbon atoms in a chain. This until very recently that for the heavier elements, even this picture of having a fixed number of bonds doesn't really work,. It's a more complicated story of this whole cloud of electrons rather than a definite direction where it can connect to another atom. And certain probabilities of having atoms in different orientations relative to the