A look into the nucleus
We will answer these questions soon, but first we need to look into the nature of the
nucleus and quantum mechanics.
Protons are positive and electrically repel one another. A nucleus would blow
apart if it weren't "glued" together by the gluon particles which affect every part
of the nucleus. This is called the residual strong force.
Think of a nucleus as a tightly coiled spring
which is the electrical repulsion, held in place by a very big rope
which is the residual strong force.
Even though there is a lot of stored-up energy in the spring,
it can't release the energy because the rope is too strong.