Uranium Element in Periodic Table | Atomic Number Atomic Mass

Uranium

Uranium Element:

Uranium is the fourth chemical element in the actinide series of periodic table. Its atomic number is 92 and is represented by the symbol U. Among the primordially occurring actinide elements, uranium has the highest atomic weight. It is weakly radioactive since all its isotopes are unstable with half-life periods ranging from 159200 years to 4.5 billion years. U is a silvery white metal and mildly paramagnetic. It is malleable and ductile. Barring noble gases, uranium reacts with all non-metals and their compounds with its reactivity proportionately increasing with temperature. When U-235 isotope is collided with slow electrons, it is divided into smaller nuclei, entailing in nuclear chain reaction liberating heat energy. A small quantity of 7 kgs of U-235 is sufficient to create an atom bomb. It was used in preparation of the atom bomb called “little boy” that was dropped in the Japanese city of Hiroshima in the World War II.

Uranium is found in three allotropic forms – α, β and γ. The α-allotrope has orthorhombic strcture and is stable up to 668 °C. The β –version of uranium allotrope possesses tetragonal structure and  is stable between 668 °C and 775 °C. The other category with body-centered cubic structure is known as γ variant of uranium allotrope which is stable beyond 775 °C.

Uses Of Uranium Element:

The major use of uranium is its utility in preparation of atom bombs. Uranium is also used in glazing industry of pottery and ceramic tiles of different hues. Uranium is used as a toner in photographic chemicals. Uranium salts are used as mordant in preparation of long-lasting dyes on silk and woolen fabrics. Uranium is also used in estimating the age of the earliest igneous rocks by radiometric dating.

Uranium

Uranium Element Information:

Discovery year: 1789

Discovered by:Martin Heinrich Klaproth

Atomic number: 92

Relative atomic mass: 238.029

Electron configuration: [Rn] 5f3 6d1 7s2

Block: f-block

Other elements in the same block:

Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium, Thorium, Protactinium, Neptunium, Plutonium, Americium, Curium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium and  Lawrencium are the elements in the same block.

Period: period 7 

Other elements in the same period:

Francium, Radium, Actinium, Thorium, Protactinium, Neptunium, Plutonium, Americium, Curium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium, Lawrencium, Rutherfordium, Dubnium, Seaborgium, Bohrium, Hassium, Meitnerium, Darmstadtium, Roentgenium, Copernicium, Nihonium, Flerovium, Moscovium, Livermorium, Tennessine and Oganesson.

Group: Actinides

Other elements in the same group:

Thorium, Protactinium, Neptunium, Plutonium, AmericiumCurium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium and Lawrencium are the elements in the same group.

Other elements in the same orbital:

Actinium, Thorium, Protactinium, Neptunium, Plutonium, Americium, Curium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium and Lawrencium are the elements in the same orbital.

Allotropes: none

Key isotopes: 234U, 235U, 238

Melting point: 1135°C, 2075°F, 1408 K 

Boiling point: 4131°C, 7468°F, 4404 K

Element category:  actinide

Density (g cm−3): 19.1

CAS number: 7440-61-1

Color: silvery gray metallic

You can know detailed information for each element,

Hydrogen, HeliumLithiumBerylliumBoronCarbonNitrogenOxygenFluorine,  Neon , SodiumMagnesiumAluminiumSiliconPhosphorusSulfurChlorineArgon, PotassiumCalciumScandiumTitaniumVanadiumChromiumManganeseIronCobaltNickelCopperZincGalliumGermaniumArsenicSeleniumBromine, Krypton,  Rubidium, StrontiumYttriumZirconiumNiobiumMolybdenumTechnetiumRutheniumRhodiumPalladiumSilverCadmiumIndiumTinAntimonyTelluriumIodine, Xenon,  Caesium, BariumLanthanum,  CeriumPraseodymiumNeodymiumPromethiumSamariumEuropiumGadoliniumTerbiumDysprosiumHolmiumErbiumThuliumYtterbiumLutetiumHafniumTantalumTungstenRheniumOsmiumIridiumPlatinumGoldMercuryThalliumLeadBismuthPoloniumAstatine, Radon,  Francium, RadiumActiniumThoriumProtactiniumUraniumNeptuniumPlutoniumAmericiumCuriumBerkeliumCaliforniumEinsteiniumFermiumMendeleviumNobeliumLawrenciumRutherfordiumDubniumSeaborgiumBohriumHassiumMeitneriumDarmstadtiumRoentgeniumCoperniciumNihoniumFleroviumMoscoviumLivermoriumTennessine, Oganesson.

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