Question

What is the difference between binding energy and ionization energy?

Answer 1

The binding energy can be defined as the amount of energy required to disassemble a system of particles into individual parts. It is equal to the mass defect. Ionization energy is the minimum amount of energy required to remove an electron from the outermost orbital or shell from its gaseous atom.

Complete answer:
Molecules are the combination of atoms attached together through a chemical bonding.
Atoms consist of subatomic particles like electrons, protons and neutrons.
The ionization energy of an atom is defined as the minimum amount of energy required to remove an electron from the outermost orbital. It is expressed in $kJ{\left( {mole} \right)^{ - 1}}$ .
The binding energy can be defined as the amount of energy required to disassemble a system of particles into individual parts. It is equal to the mass defect. It is expressed in MeV.
The ionization energy of nitrogen is $1402kJ{\left( {mole} \right)^{ - 1}}$
It is high as compared to the atoms in the same group as the ionization energy decreases along the group, as the size of the atom is going to increase along the group.
The binding energy of nitrogen is $104.67MeV$
Binding energy can also be defined as the minimum amount of energy required to remove the particle from a system of particles.

Note:
The binding energy can be calculated from the mass defect. It is the energy gained to combine the protons and neutrons into a nucleus. Whereas ionization energy is the minimum amount of energy required to remove an electron.