So notice the bench shape of the H 20 molecule. Now, oxygen is much more electronegative than either of these h atoms. And because of that, oxygen is able to pull that electron density away from these two H atoms. And because it is much more likely that electron density will be found around the oxygen than around the h atoms, and at any given moment in time, that oxygen atom will have a partial negative charge, and the two h atoms will be deficient of the electron density, and so they will have a partial positive charge. Now, from physics, we know that whenever we have the separation of two opposite charges, whenever a positive charge is separated from a negative charge by a certain distance, there will exist an electric dipole moment as a result of that separation of charge. So what does that mean about this water molecule here?