Here's why:

* Formation of bonds: When atoms form bonds, they release energy. This is because the atoms become more stable by sharing or transferring electrons. This released energy is often in the form of heat or light.

* Breaking of bonds: To break a chemical bond, energy must be added to the system. This is because the atoms are being forced to move apart and overcome the attractive forces holding them together.

Therefore, a chemical bond stores the energy that was released when it formed. This energy can be released again when the bond is broken. This is the fundamental basis for chemical reactions and the energy flow in living systems.

Let me know if you'd like more detail on any of these concepts!