Uranium is a heavy, radioactive metallic element with the chemical symbol U and atomic number 92. It is part of the actinide series in the periodic table and is primarily known for its use as a fuel in nuclear reactors and in the production of nuclear weapons. Uranium is found in various minerals in the Earth's crust, most commonly in uranium oxide minerals such as uraninite.
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The chemical element with atomic number 92. Its long-lived radioactive isotopes illustrate actinide production by the rapid neutron-capture process.
