The energy associated with the relative positions of electrons and nuclei in atoms and molecules is called thermal energy.
Generally, the energy possessed by an object due to its position is known as potential energy of the object while the energy possessed by an object due to its motion is called kinetic energy.
However, thermal energy describes the energy that is associated with the relative positions of electrons and nuclei in atoms and molecules.
Thus, we can conclude that the energy associated with the relative positions of electrons and nuclei in atoms and molecules is called thermal energy.
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