Mu “buziba” (atomu) obwo waggulu amakkati bwe “buziizi” (nnyukiriyaasi), ekitegeeza nti amakkati ye nnyukiriyaasi ya atomu. Enkoloboze ziraga “emitendera gy’amasoboza” (energy levels). Ekikube ekyo waggulu kikulaga “obuziizi bw’obuziba” oba gamba “nnyukiriyaasi ya atomu” (the necleous of the atom).