And what that means is non polar substances have a symmetric distribution of charge and so they will not show an electric dipole nomin like water does. So non polar substances have no polarity and do not interact favorably with water because if they don't have an unequal separation of charge, that means they cannot form these relatively strong hydrogen bonds. And so if we take a single non polar molecule and we place it into water, what will happen is all these water molecules will essentially form a cage around the non polar molecule. And that is not a stabilizing effect because all these water molecules will essentially be fixed. They will be trapped around that non polar molecule and these water molecules will not be able to interact favorably with other water molecules. So when a non polar substance is added to water, the water molecules form a cage around that non polar molecule as shown in this diagram.