One class of nuclear weapon, a fission bomb (not to be confused with the fusion bomb), otherwise known as an atomic bomb or atom bomb, is a fission reactor designed to liberate as much energy as possible as rapidly as possible, before the released energy causes the reactor to explode (and the chain reaction to stop).
En klasse af kernevåben, en fissions-bombe (ikke at forveksle med fusionsbombe), også kaldet atomar bombe eller atombombe, er en fissions reaktor, der er designet til at frigøre så meget energi som muligt så hurtigt som muligt, inden den frigjorte energi splitter reaktoren ad, og kædereaktionen derfor stopper.