Question

define exchange energy in brief​

Answer 1

Exchange energy : "It can be defined as the electrons which are there in degenerate orbitals have a parallel spin and tend to exchange their position"

• The exchange energy is the energy released when two or more electrons with the same spin exchange their positions in the degenerate orbitals of a subshell.
• But a small amount of energy of that electronic arrangement decreases due to their exchange of position. As a result, the stability of the electronic arrangement increases.
• The amount of energy decreases for such type of position exchange between two electrons for one time is called Exchange energy.
• When the orbitals are half-filled or completely filled then the number of exchanges is maximum. Therefore, its stability is maximum