And on the product side, we have a bond between B and C. And what that implies is to actually go from the reactants to the products, we have to break the bond between A and B and we have to form the bond between B and C. So in that transition stage, what we're going to see is a bond breaking between A and B. So B will begin to move away from A and because the electron density will basically move away, that bond between A and B will begin to break. And that can be described by using a dashed line. So this dashed line between A and B basically moves. B is moving away and the bar and that bond is being broken. On the other hand, because B is approaching C, the electron densities of these two atoms or molecules is overlapping.