Now, notice what happened here when we were going in this direction, I needed to input energy into my atom to take away that electron. And I said that this had a higher energy than this atom. So now we're working backwards. Now we have an atom, a beryllium atom that has a positive charge that is higher in energy than this product, than this neutral beryllium. So, in other words, when I take an electron, I put the electron inside my atom. Energy is released.