Uranium is a naturally occurring radioactive element, which has the atomic number of 92 and corresponds to the chemical symbol U in the periodic table. It belongs to a special group of elements called “actinides” — elements that were discovered relatively late in history. Like all other act...
Uranium (pronounced /jʊˈreɪniəm/ yoo-RAY-nee-əm) is a silvery-white metallic chemical element in the actinide series of the periodic table with atomic number 92. It is assigned the chemical symbol U. A uranium atom has 92 protons and 92 electrons. 6 of the latter are val...
The universe's uranium formed 6.6 billion years ago in supernovae, according to theWorld Nuclear Association. It is all over the planet, and makes up about 2 to 4 parts per million of most rocks. It is 48th among the most abundant elements found in natural crustal rock, according to the...
It occurs as a naturally radioactive silvery-white metal and is one of the more common chemical elements in the Earth’s crust. Denoted by the symbol U, it has atomic number 92 in the periodic table of elements, meaning its nucleus contains 92 positively charged protons, o...
Learn about the uranium definition. Discover uranium on the periodic table, whether uranium is metal or nonmetal, its discovery, abundance, and how...
atomic number 92,U metal,metallic element- any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. uranium 235- a uranium isotope with mass number 235; capable of sustaining chain reactions ...
uranium (U), radioactive chemical element of the actinoid series of the periodic table, atomic number 92. It is an important nuclear fuel. Uranium constitutes about two parts per million of Earth’s crust. Some important uranium minerals are pitchblende (impure U3O8), uraninite (UO2), carno...
Uranium is a chemical element; it has 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 by emitting an alpha particle. The...
A new version of the periodic system of the elements is proposed in a form accounting for the analogs linear rule and two shell structure of diads (coupled periods).doi:10.1016/B978-0-08-020638-7.50031-2ABAS A. CHAIKHORSKYProceedings of the Moscow Symposium on the Chemistry of Transuranium ...
Martin Heinrich Klaproth(born Dec. 1, 1743,Wernigerode, Brandenburg—died Jan. 1, 1817,Berlin,Prussia[now in Germany]) was a German chemist who discovereduranium(1789),zirconium(1789), andcerium(1803). He described them as distinct elements, though he did not obtain them in the pure metalli...