Hyperuranion

Hyperuranion is a type of uranium. It is a heavy, radioactive metal that can exist in two different forms or 'isotopes': uranium-238 and uranium-235. Uranium-238 is the most common isotope and is usually found in rocks, soil, and oceans. It is very unstable and breaks down into other elements, releasing energy. Uranium-235 is much rarer, but is the most important isotope because it can be used to make nuclear reactors and nuclear weapons. It is also unstable, but releases much more energy when it breaks down than uranium-238.