Where all energy is stored in compounds?

A compound's energy comes from three sources. 1) The motion of the particles (atoms, molecules) means it has kinetic energy (which is what gives the compound its temperature). 2) The mass of the compound, since mass is a form of energy which can be converted to the other forms. 3) The main source of energy are the electromagnetic and nuclear bonds of the compound, which give it potential energy. Usually when one speaks of bond energy of a compound, they are referring to the bond energy supplied by the electromagnetic bonds. The particles constantly exert forces on each other which means potential energy is constantly supplied. When the bonds of a compound are broken, the potential energy gets converted to kinetic energy (motion).