Let's say we have a Na+ and a Cl- ion moving towards each other. When they combine, energy will be released. My question is - in what form will the energy be released and in what will the kinetic energy of the Na+ and Cl- nuclei be converted too? My guess is that the energy will be released in the form of radiation and the kinetic energy of the nuclei will be converted to the oscillatory energy of the molecule of NaCl. Am I correct?