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 which 6 are valence electrons. Uranium radioactively decays, usually by …
铀 - 维基百科，自由的百科全书
2024年9月11日 · 铀 yóu （英语： Uranium），是一种 化学元素，其 化学符号 为U， 原子序数 为92， 原子量 为 238.028 91 u，属于 锕系元素。 铀是一种密度大的银白色 重金属，具有微 放射性，其 密度 比 铅 高出大约70%，比 金 和 钨 低。 铀金属具有相当的反应性，在空气中表面会形成深灰色氧化层。 天然的泥土、岩石和水中含有百万分之一至百万分之十左右的铀。 采矿工业从 沥青铀矿 等 矿物 中提取出铀元素。 已知的铀 同位素 都不稳定，其中以最长寿的 铀-238 （半 …
Uranium | Definition, Properties, Uses, & Facts | Britannica
2024年12月6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 that is silvery white in color. It is ductile, malleable, and capable of taking a high polish. Learn more about uranium in this article.
Uranium - Element information, properties and uses | Periodic …
Element Uranium (U), Group 20, Atomic Number 92, f-block, Mass 238.029. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
Uranium | U (Element) - PubChem
Uranium is the heaviest naturally-occurring element available in large quantities. The heavier “transuranic” elements are either man-made or they exist only as trace quantities in uranium ore deposits as activation products.
Uranium (U) - Periodic Table
Uranium is the 92nd element in the periodic table and has a symbol of U and atomic number of 92. It has an atomic weight of (238.02891) and a mass number of 238. Uranium has ninety-two protons and one hundred forty-six neutrons in its nucleus, and ninety-two electrons in …
Uranium (U) - American Elements
Uranium is a Block F, Group 3, Period 7 element. The number of electrons in each of Uranium's shells is 2, 8, 18, 32, 21, 9, 2 and its electron configuration is [Rn] 5f 3 6d 1 7s 2. The uranium atom has a radius of 138.5.pm and its Van der Waals radius is 186.pm. In its elemental form, CAS 7440-61-1, uranium has a silvery gray metallic appearance.
Uranium - Simple English Wikipedia, the free encyclopedia
Uranium is a chemical element (a metal) on the periodic table. It has an atomic number of 92, which means that a uranium atom has 92 protons in its center, the nucleus . Uranium dug out of the ground is made from three different isotopes .
Uranium | U | CID 23989 - PubChem
2009年5月28日 · Uranium is a common naturally occurring and radioactive substance. It is a normal part of rocks, soil, air, and water, and it occurs in nature in the form of minerals – but never as a metal. Uranium metal is silver -colored with a gray surface and is nearly as strong as steel.
Uranium (U) Element: History, Properties, Reactions, Uses
2023年12月6日 · Uranium, a metallic chemical element found in the periodic table with atomic number 92 and denoted by the symbol U, displays a silvery-white appearance. Each uranium atom is characterized by 92 protons and 92 electrons, including 6 valence electrons. Notably, uranium boasts the highest atomic weight among naturally occurring elements.
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