Ekikyusabuziba=ekikolwa ekikyusa obuziba(chemical reaction) kiva ku busannyalazo obubeera ku kire ekyetoloodde obuziizi(nucleus). Obuziizi(Nucleus) tebulina kakwate konna na kikyusabuziba era busigala tebukyusiddwa n'akatono yadde mu bikyusabuziba ebisingayo amaanyi.