Binding Energy
The energy required to break a nucleus into its constituent nucleons and place them at an infinite distance is called binding energy.
BE = (△m) c2 = c2 [Zmp +(A-Z)mn– M(ZXA)]
where,
mp = mass of protons
Z = Atomic number
A = Mass number
c = speed of light
Rest Mass of Protons + Rest Mass of Neutrons = Rest Mass of Nucleus + BE
Structure of Nucleus
The nucleus of an atom consists of two types of particles, positively charged particles called protons and neutrally charged particles called neutrons. Protons + Neutrons in an atom represent the nucleus of an atom. The nucleus of an atom is represented by ZXA, where X is the nucleus of an atom, Z is the atomic number and A is the mass number.