Nuclear binding energy is defined as the minimum amount of energy required to disassemble or break down an atom's nucleus into the subatomic particles that make it up (which are protons and neutrons).
The term nucleon refers to the group of subatomic particles that reside in the nucleus, namely protons and neutrons.
The net binding energy associated with a given nucleus is equal to the difference between nuclear attraction and electric force disruptive energy.
It is worth noting that the net binding energy per nucleon increases with the number of nucleons in the nucleus.
As a result, the net binding energy per nucleon is proportional to the atomic number.