What Do You Mean By Exchange Energy?

In chemistry and physics, the exchange interaction is a quantum mechanical effect that only occurs between identical particles. 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.

We can define it as:

The energy released when the anti-parallel electrons belonging to a degenerate (same energy) subshell are made to have parallel spins.

Exchange energy forms an important part of the covalent bond of many solids and is also responsible for ferromagnetic coupling.

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