The amount of energy required to separate a particle from a particle system or disperse all of the system's particles is known as binding energy.
Binding energy is particularly relevant in the case of subatomic particles in atomic nuclei, electrons bound to nuclei in atoms, and atoms and ions linked together in crystals.
The types of binding energy are: 3.1 Electron binding energy:Electron binding energy which is also commonly known as ionization energy is the energy required to remove an electron from its atomic orbital. 3.2 Atomic binding energy: Atomic binding energy of the atom is the energy that is used to break down an atom into free electrons and a nucleus. 3.3 Nuclear binding energy:Nuclear binding energy is basically the energy required to dismantle a nucleus into free unbound neutrons and protons.
Binding energy per nucleon is known as specific binding energy.
Binding energy is applied in determining whether fusion or fission will be favorable.