Attraction between nuclei and electron in QED is the most simply described with Feynman's diagram and calculation, when an electron fastly flow close to a nuclei. (?? scattering) 1. But how, in QED, to describe attraction between almost standstill electron and nuclei. In classical physics this gives F=e^2/r^2. Is this constant flow of virtual photons, which gives this attraction? 2. What is difference between classical and QED scattering of an electron on the nuclei? I read some Feynman books, so you can give me its references. Thanks in advance.