 Hello, this is Steven Nesheva, and I'm going to expand a little bit on what we can do in Spartan. In this case, what we're looking at is finding ways to tell how much two atoms or two molecules are attracted to each other and by what strength. So the way we've set this up is I've got two argons here, and they are already in the space filling model, as I can kind of confirm there. And so I know that there are about, well, about almost four angstroms apart, because I've already done a minimization to confirm that. I'm going to click on this icon here, and press again on this minimizer, and once that's done, and we can see that the energy between them is about minus a half kilojoules per mole. So the question is how much energy does it take to pull them apart? Well, and the way that we can do that is I'm going to go to this distance icon here again, and select the two argon atoms. And over here, we found before that it, I think, takes at least 10 angstroms, is enough to take them away from their interaction range. So I'm going to enter that, and so now there are 10 angstroms apart, and I'm going to do this energy minimizer again. And I can see that, yep, the energy, they're not being attracted to each other, so they must be out of range, and Spartan is telling me that the energy of interaction now is zero. So if you think about it, to go from a negative number up to zero, that's how much energy it took to pull them apart. So we could say that the energy of attraction between two argon atoms must be a half a kilojoule per mole. And we can do this for other molecules and atoms just as well.