Atom orbitals, I mean the ones where electrons orbit proton with continuous trajectory like planets orbit around the sun. I do not mean to disagree with modern teachings nor to speculate, I simply do not see how QM actually excludes this possibility. I just want someone walk me through several most convincing experiments and show me how did humanity itself changed their opinion from "electron orbitals" to "electron clouds". I know there are couple of explanations like "electrons would radiate and spiral down to nucleus", but I do not know of any experimental evidence to support that. Also, I was wondering, are there some fields in physics that still use this or similar model of atom based on classical mechanics?