Uranio elemento wikipedia. 274%) and 235 U (0. Naturally occurring uranium is composed of three major isotopes: uranium-238 (238 U with 99. It has two primordial isotopes, uranium-238 and uranium-235, that have long half-lives and are found in appreciable quantity in Earth's crust. In 1938, German physicists Otto Hahn and Fritz Strassmann showed that uranium could be split into parts to yield energy. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium is the principal fuel for nuclear reactors and the main raw material for nuclear weapons. In addition to isotopes found in Enriched uranium is a type of uranium in which the percent composition of uranium-235 (written 235 U) has been increased through the process of isotope separation. Almost 50,000 tons of uranium were produced in 2022. 0049–0. [1] 235 U is the only 2021 uranium mining by nation [1] Schematic diagram of stages from uranium mining to energy production Uranium mining is the process of extraction of uranium ore from the earth. It has a Mohs hardness of 6. All uranium isotopes present in natural uranium are radioactive and fissionable, and 235 U is fissile (will support a neutron-mediated chain reaction). Aug 16, 2023 · Uranium is a naturally occurring radioactive element, which has the atomic number of 92 and corresponds to the chemical symbol U in the periodic table. The most common isotopes in natural uranium are 238 U (99. Kazakhstan, Canada, and Namibia were the top three uranium producers, respectively, and together account for 69% of world production. Uranium radioactively decays, usually by emitting an alpha particle. Other countries producing more Uranium is a chemical element; it has symbol U and atomic number 92. It has the chemical symbol U and atomic number 92. Other countries producing more . Hydrochloric and nitric acids dissolve uranium, but Uranium is a silvery-gray, weakly radioactive metallic chemical element. 2732–99. 711%). 7210%), and uranium-234 (234 U, 0. 5 billion years for different isotopes, making Sep 19, 2025 · Uranium, radioactive chemical element of the actinoid series of the periodic table, atomic number 92. It is malleable, ductile and slightly paramagnetic. Other isotopes such as uranium-233 have been produced in breeder reactors. 7198–0. 1 g/cm 3. It is a poor electrical conductor. Learn more about uranium in this article. Uranium is a primordial element that is used in nuclear power generation. Uranium is no longer mined for defense purposes. [9] Uranium metal reacts with almost all non-metal elements and their compounds. [7][8] Uranium metal has a very high density of 19. It is strongly electropositive. Uranium is a silvery white, weakly radioactive metal. Feb 6, 2025 · Uranium (chemical symbol U) is a naturally occurring radioactive element. 2752% natural abundance), uranium-235 (235 U, 0. It is a dense, hard metallic element that is silvery white in color. Uranium is a chemical element; it has symbol U and atomic number 92. It belongs to a special group of elements called “actinides” — elements that were discovered relatively late in history. It is a silvery-grey metal in the actinide series of the periodic table. The half-life of this decay varies between 159,200 and 4. Like all other First discovered in the 18th century, uranium is an element found everywhere on Earth, but mainly in trace quantities. It is ductile, malleable, and capable of taking a high polish. It is an important nuclear fuel. Uranium, thorium, and one Uranium (92 U) is a naturally occurring radioactive element (radioelement) with no stable isotopes. The decay product uranium-234 is also found. 0059%). 8zowu k8csrsb oqnsej lqcf 6b75c qib 6eu3xz3u j56rm1 00fkz vc