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Uranium-214 is the lightest known isotope of uranium. It was discovered at the Spectrometer for Heavy Atoms and Nuclear Structure (SHANS) at the Heavy Ion Research Facility in Lanzhou, China in 2021, produced by firing argon-36 at tungsten-182. It alpha-decays with a half-life of 0.5 ms.
This is a list of radioactive nuclides (sometimes also called isotopes), ordered by half-life from shortest to longest, in seconds, minutes, hours, days and years. Current methods make it difficult to measure half-lives between approximately 10 −19 and 10 −10 seconds.
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.
[11] [12] Uranium metal has a very high density of 19.1 g/cm 3, [13] denser than lead (11.3 g/cm 3), [14] but slightly less dense than tungsten and gold (19.3 g/cm 3). [ 15 ] [ 16 ] Uranium metal reacts with almost all non-metallic elements (except noble gases ) and their compounds , with reactivity increasing with temperature. [ 17 ]
3 H , the radioisotope of hydrogen, is available at very high specific activities, and compounds with this isotope in particular positions are easily prepared by standard chemical reactions such as hydrogenation of unsaturated precursors. The isotope emits very soft beta radiation, and can be detected by scintillation counting.
It is prevented from having a stable isotope with 4 protons and 6 neutrons by the very large mismatch in proton/neutron ratio for such a light element. (Nevertheless, beryllium-10 has a half-life of 1.36 million years, which is too short to be primordial, but still indicates unusual stability for a light isotope with such an imbalance.)
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.
6.95: Ammonal (Al+NH 4 NO 3 oxidizer) [citation needed] 6.9: 12.7: Tetranitromethane + hydrazine bipropellant - computed [citation needed] 6.6: Nitroglycerin: 6.38 [9] 10.2 [10] ANFO-ANNM [citation needed] 6.26: battery, Lithium–air: 6.12: Octogen (HMX) 5.7 [9] 10.8 [11] TNT [12] 4.610: 6.92: Copper Thermite (Al + CuO as oxidizer) [citation ...