Mu sayansi ow’Oluganda, “obuziba” bw’ekimette buba wala naye ate “obuziizi” buba wala nnyo n’eriiso okusinga obuziba. Obutoffaali obuzimba nabuzimbe (buli kintu) bwe tuyita obuziba (atomu) bwakyo ate “obuziizi” (nucleous) bwakyo ky’ekitundu ky’obuziba (atomu) ekisembayo munda, mu makkati.