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Uranium-234 (234 U or U-234) is an isotope of uranium.In natural uranium and in uranium ore, 234 U occurs as an indirect decay product of uranium-238, but it makes up only 0.0055% (55 parts per million, or 1/18,000) of the raw uranium because its half-life of just 245,500 years is only about 1/18,000 as long as that of 238 U.
Uranium (92 U) is a naturally occurring radioactive element (radioelement) with no stable isotopes. 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. The decay product uranium-234 is also found.
Of the 26 "monoisotopic" elements that have only a single stable isotope, all but one have an odd atomic number—the single exception being beryllium. In addition, no odd-numbered element has more than two stable isotopes, while every even-numbered element with stable isotopes, except for helium, beryllium, and carbon, has at least three.
uranium-234: 245.5 7.75 chlorine-36: 301 9.5 selenium-79: 327 10.3 curium-248: 348 ... List of elements by stability of isotopes; List of nuclides; Orders of ...
Triuranium octoxide is (depending on conditions) the most stable compound of uranium and is the form most commonly found in nature. Uranium dioxide is the form in which uranium is most commonly used as a nuclear reactor fuel. [104] At ambient temperatures, UO 2 will gradually convert to U 3 O 8. Because of their stability, uranium oxides are ...
It forms various chemical compounds, ... and 234 91 Pa from uranium compounds. ... The most stable is the white pentoxide Pa 2 O 5, ...
Hence, a parent isotope is one that undergoes decay to form a daughter isotope. For example element 92, uranium, has an isotope with 144 neutrons (236 U) and it decays into an isotope of element 90, thorium, with 142 neutrons (232 Th). The daughter isotope may be stable or it may itself decay to form another daughter isotope.
Uranium compounds are compounds formed by the element uranium (U). Although uranium is a radioactive actinide , its compounds are well studied due to its long half-life and its applications. It usually forms in the +4 and +6 oxidation states , although it can also form in other oxidation states.