So what Coulomb's Law says is the following if we place two electrons next to each other, they will repel. They will create repulsion forces. So this leads into the following fact placing electrons into the same orbital in a subshell will create repulsion forces. And this explains two ideas. This is why a maximum of two electrons can go into an orbital. Because if we place three, four or five electrons into the same orbital, this will increase our force dramatically, creating a lot of repulsion forces, creating a lot of repulsion.