Uranium

From Srafopedia

Uranium (commonly Uranium-236) is an atom that contains 92 protons, commonly 144 neutrons, and 92 electrons. As a result, the nucleus is inherently unstable, and every so often, it emits a number of neutrons (commonly three) and splits into two smaller atoms that come somewhere around Iron (Fe) in the periodic table of elements, for reasons that are rather unnecessary to explain here. In a chain reaction, the neutrons then hit another three atoms, which in turn emit three neutrons, which hit nine atoms, which emit twenty-seven neutrons, and so on and so forth, until there is an unstoppable reaction that produces vast amounts of energy in a very short period of time. This is the basis for nuclear fission, which is used in nuclear power stations, and more notably, nuclear weapons.