I've read that the cause of Nuclear fission and nuclear fusion lies in the fact that Nuclear Binding Energy confers stability to a nucleus. This is why too heavy or too light nuclei resort to these processes to attain stability, and become nuclei with intermediate atomic weight. Two questions come to my mind here
is it an experimental observation that nuclei with intermediate atomic mass are stable, or is there a reason to it? I can understand that too many protons in the nucleus would lead to instability. But what harm can too many neutrons cause?
I've always known that everything in nature tries to lose energy to attain stability. That's why bonds are formed in the first place. But why is it that more binding energy per nucleon makes a nucleus more stable?