Hello, I was just thinking that many type of energies might be interacting with atoms and molecules. As such, are/can they keep the informations their interactions with energies (non-chemical reaction based) for long? So; Can atoms and molecules store informations of "non-chemical reaction based" interactions with these? If yes, How? Can it be by some variations in their structure or motions showing variations in their absorbed, emited or reflected energies/spectrum/wave-lengths OR by some degradation of atoms/molecules as a natural process? Whether every atom/molecule of same element/composition have absolutely same absorption, emission or reflection levels? In short, are different atoms/molecules of same element/substance are absolutely same or not? I am not asking/considering isotopes. Best wishes.