Niels Bohr proposed a product of the atom where the electron was in the position to occupy only sure orbits around the nucleus. In 1913, Henry Moseley uncovered an empirical relationship in between the strongest X-ray line emitted by atoms underneath electron bombardment (then often called the K-alpha line), as https://ideadigest.de/die-rolle-von-bohrmaschinen-in-der-modernen-fertigung/