Now, what happens, for example, if we take away this H atom and along with the H atom, we take away one electron and we leave one electron on this molecule. Now, let's suppose I take two of such molecules and I interact them in such a way so that I form the following compound. So, these two electrons interact to form a covalent SP three hybridized bond, and I form a compound with two carbons. So now I have Ethane, which has a molecular formula c, two H six. Now, I can continue doing this to produce propane, butane pentane, hexane, heptane, octane and so on. Now, butane for example, is another type of alkane that's composed of four carbon atoms.