Uranium-235 (235 U or U-235) is an isotope of uranium making up about 0.72% of natural uranium. Unlike the predominant isotope uranium-238, it is fissile, i.e., it can sustain a nuclear chain reaction. It is the only fissile isotope that exists in nature as a primordial nuclide. Uranium-235 has a half-life of 703.8 million years.

Mar 5, 2025 · uranium-235 (U-235), radioactive isotope of the element uranium with a nucleus containing 92 protons and 143 neutrons. Uranium-235 is the only naturally occurring fissile material; that is, the uranium-235 nucleus undergoes nuclear fission when it collides with a slow neutron (a neutron with a kinetic energy less than 1 electron volt).

Uranium (U-235 and U-238) is a heavy metal that is naturally occurring in the environment. It can be found in almost all rock, soil, and water. Ingesting or inhaling large concentrations of uranium can cause severe health effects.

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.

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 …

The following table shows the atomic nuclei that are isotonic (same neutron number N = 143) and isobaric (same nucleon number A = 235) with Uranium-235. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Uranium-235 is the only fissile radioactive isotope which is a primordial nuclide existing in nature in its present form since before the creation of Earth. CAS Number: 15117-96-1.

Az urán-235, jelöléssel 235 U az urán egyik izotópja, a természetes uránban csak 0,72%-ban fordul elő, ezért a reaktorokban dúsított uránt használnak. A jóval nagyobb részarányú 238 U-cal ellentétben hasítható , azaz nukleáris láncreakció fenntartására képes – az egyetlen hasítható izotóp, mely primordiális ...

Uran-235 ist das Isotop des chemischen Elements Uran, dessen Atomkern aus 143 Neutronen und den für dieses Element charakteristischen 92 Protonen besteht; daraus resultiert die Massenzahl 235. Uran-235 wurde 1935 von Arthur Jeffrey Dempster - einem ein kanadisch-amerikanischen Physiker - entdeckt.

Uran-235 (235 U) er en naturligt forekommende uran - isotop. Den adskiller sig fra den langt mere almindelige uranisotop uran-238 (238 U) ved, at den er i stand til skabe en hurtigt udviklende kædereaktion.