21. Intermediate binding energies lying between these levels are not permitted. 22. Results from the calculations can include the binding energy . 23. A crude approximation, for photon energies above the highest atomic binding energy , is given by: 24. An electron is normally found in the lowest energy level, with the largest binding energy . 25. A graphical representation of the semi-empirical binding energy formula. 26. In a stable orbit the binding energy is a local minimum relative to parameter perturbation. 27. State A is also very lightly bound with binding energy half that of state X. 28. For every element and core ( atomic orbital ) there will be a different binding energy . 29. However, Planck was thinking about chemical reactions, where the binding energy is too small to measure. 30. A much stronger type of binding energy, the nuclear binding energy , is involved in nuclear processes.