Uranium - Wikipedia
Uranium is a chemical element with the symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of …
Uranium: Facts about the radioactive element that powers …
2022年3月9日 · Uranium is naturally radioactive: Its nucleus is unstable, so the element is in a constant state of decay, seeking a more stable arrangement. In fact, uranium was the element …
What is Uranium? | IAEA - International Atomic Energy Agency
2023年8月16日 · Like all other actinides, uranium is “radioactive” – it decays over time and releases energy in the process. Its special properties make uranium the main source of fuel for …
Uranium | Definition, Properties, Uses, & Facts | Britannica
2024年11月20日 · Uranium, radioactive chemical element of the actinoid series of the periodic table, atomic number 92. It is an important nuclear fuel. It is a dense, hard metallic element …
Uranium-235 (U-235) and Uranium-238 (U-238) | Radiation Emergencies …
2024年4月17日 · Chemical properties: Weakly radioactive, extremely dense metal (65% denser than lead) Appearance: When it has been refined and enriched, uranium is a silvery-white …
Radionuclide Basics: Uranium | US EPA
2024年2月5日 · Uranium (chemical symbol U) is a naturally occurring radioactive element. Uranium is a primordial element that is used in nuclear power generation. Uranium is no …
Periodic Table of Elements: Los Alamos National Laboratory
Uranium is weakly radioactive because all naturally occurring (or primordial) isotopes of uranium (238 U, 235 U and 234 U) are unstable, with half-lives varying between 159,200 years and 4.5 …
Uranium is radioactive and in nature has three primary isotopes with different numbers of neutrons. Natural uranium, 238 U, constitutes over 99% of the total mass or weight, with …
Uranium | U (Element) - PubChem
Uranium is weakly radioactive because all naturally occurring (or primordial) isotopes of uranium (238 U, 235 U and 234 U) are unstable, with half-lives varying between 159,200 years and 4.5 …
Uranium: - Institute for Energy and Environmental Research
Uranium isotopes are radioactive. The nuclei of radioactive elements are unstable, meaning they are transformed into other elements, typically by emitting particles (and sometimes by …