sentence: Nuclear weapons are made from the elements uranium or plutonium.
sentences_after: Certain forms of these elements can be made to undergo nuclear fission and have a nuclear chain reaction. This produces a very large amount of energy and radiation, and will kill any people or animals within several kilometers. Much of the radiation is X-rays, which heats air to produce a huge nuclear fireball. The rapid expansion of the fireball produces a dangerous shock wave that destroys houses or buildings even several kilometers away. It will eventually kill people farther away than several kilometers depending on how much radiation the person received.
concept_name: nuclear weapon
headings: Nuclear weapon
categories: Nuclear weapons