why is it enriched?
For nuclear weapons and most nuclear power plants.
Uranium
In nature, uranium is found as uranium-238 (99.2742%) and uranium-235 (0.7204%). Isotope separation concentrates (enriches) the fissionable uranium-235 for nuclear weapons and most nuclear power plants, except for gas cooled reactors and pressurised heavy water reactors. Most neutrons released by a fissioning atom of uranium-235 must impact other uranium-235 atoms to sustain the nuclear chain reaction. The concentration and amount of uranium-235 needed to achieve this is called a 'critical mass'.
where is uranium found and how abundant is it In nature and in and a very small amounts. how does it look? When refined, uranium is a silvery white, weakly radioactive metal. what military uses does it have? The major application of uranium in the military sector is in high-density penetrators. and civilian? The main use of uranium in the civilian sector is to fuel nuclear power plants. is it radioactive? Yes who discovered it? Martin Heinrich Klaproth. what kind of research is being done on it? Fission research. can it be used to make weapons? Yes. Two major types of atomic bombs were developed by the United States during World War II: a uranium-based device whose fissile material was highly enriched uranium. what is its origin? Along with all elements having atomic weights higher than that of iron, uranium is only naturally formed by the r-process in supernovae and neutron star mergers. what 'ph' effects does it have? When the pH of a uranium(VI) solution increases, the uranium is converted to a hydrated uranium oxide hydroxide and at high pHs it becomes an anionic hydroxide complex. how is it related to halides? All uranium fluorides are created using uranium tetrafluoride, itself is prepared by hydrofluorination of uranium dioxide.
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Uranium [SEP] Enrichment
In nature, uranium is found as uranium-238 (99.2742%) and uranium-235 (0.7204%). Isotope separation concentrates (enriches) the fissionable uranium-235 for nuclear weapons and most nuclear power plants, except for gas cooled reactors and pressurised heavy water reactors. Most neutrons released by a fissioning atom of uranium-235 must impact other uranium-235 atoms to sustain the nuclear chain reaction. The concentration and amount of uranium-235 needed to achieve this is called a 'critical mass'. To be considered 'enriched', the uranium-235 fraction should be between 3% and 5%. This process produces huge quantities of uranium that is depleted of uranium-235 and with a correspondingly increased fraction of uranium-238, called depleted uranium or 'DU'.