Electron shell: The collective states of all electrons in an atom having the same principal quantum quantity (visualized as an orbit in which the electrons move). Bohr also contributed towards the clarification of the problems encountered in quantum physics, specifically by creating the notion of complementarity. Hereby he could demonstrate https://gandula.de/2024/08/01/ein-leitfaden-fur-anfanger-zum-verstandnis-der-funktionsweise-von-bohrmaschinen/