Well, initially, these two mutual H atoms are very far apart. And since they're neutral, they each have a proton, a nucleus, and an electron surrounding that nucleus. So what happens as I begin to bring these molecules closer and closer and closer? Well, as I begin moving them closer, they begin to feel electrostatic force Coulomb's law. Now, as I move them closer and closer, eventually I will bring them to a point when the electrostatic repulsion of the nuclei of the protons down the nuclei will balance out the electrostatic attraction between the electrons and the protons in the nuclei. In other words, let's look at the following example.