They are part of the atom - the electron cloud around the nucleus. https://phys.org/news/2015-10-electron-orbitals-molecules-d.html https://phys.org/news/2015-1

They are part of the atom - the electron cloud around the nucleus. https://phys.org/news/2015-10-electron-orbitals-molecules-d.html https://phys.org/news/2015-10-electron-orbitals-molecules-d....