1 Schedule for the concerts in Regina is refreshed on a regular basis. 2  Regina is really one of the best areas for concert tours in America.
1 Niels Bohr suggested that electrons in an atom were restricted to specific orbits around the atoms nucleus. 2  Bohr argued that an electron in a given orbit has a constant energy, thus he named these orbits energy level.
That is how Bohr proved that electrons orbit the nucleus in energy levels. here are some wikipedia pages u can read more info if you want. about niels bohr : https://en.wikipedia.org/wiki/Niels_Bohr. bohr's atomic model https://en.wikipedia.org/wiki/Bohr_model.