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Thechemical symbolfor Curium isCm. Tellurium is far more common in the universe as a whole than on Earth. The most electronegative atom, fluorine, is assigned a value of 4.0, and values range down to cesium and francium which are the least electronegative at 0.7. Francium is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine). It is a soft, silvery-white alkali metal. The boiling point of a substance is the temperature at which this phase change (boiling or vaporization) occurs. Thechemical symbolfor Barium isBa. When considered as the temperature of the reverse change from liquid to solid, it is referred to as the freezing point or crystallization point. Uranium is a dense, hard metallic element that is silvery white in colour. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3. Thechemical symbolfor Gold isAu. Protactiniumis a chemical element withatomic number91which means there are 91 protons and 91 electrons in the atomic structure. Thechemical symbolfor Xenon isXe. It is by mass the most common element on Earth, forming much of Earths outer and inner core. 0.121 nm. Thechemical symbolfor Sodium isNa. Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. ), and shape. It is assigned the chemical symbol U. Although neodymium is classed as a rare earth, it is a fairly common element. It is an important nuclear fuel. Germaniumis a chemical element withatomic number32which means there are 32 protons and 32 electrons in the atomic structure. Thechemical symbolfor Titanium isTi. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. For example, sodium chloride (NaCl) is an ionic compound that consists of a multitude of strong ionic bonds. These condensers use tubes that are usually made of stainless steel, copper alloys, or titanium depending on several selection criteria (such as thermal conductivity or corrosion resistance). Main and Redhill Business Center. In air the metal tarnishes and when finely divided breaks into flames. Uranium is a dense, hard metallic element that is silvery white in colour. 238.03 g.mol-1. As a result of this expansion, the density of most materials decreases. Carbon is one of the few elements known since antiquity. Physical Properties of Uranium Concentration - Uranium ranks 48th among the most abundant elements found in natural crustal rock. For example, carbon has nine possible integer oxidation states from 4 to +4. A.2 CHEMICAL PROPERTIES A.2.1 Uranium Hexafluoride Uranium hexafluoride (UF6) combines with water to form the soluble reaction products UO2F2 and HF. Very soft and malleable, indium has a melting point higher than sodium and gallium, but lower than lithium and tin. The temperature at which vaporization (boiling) starts to occur for a given pressure is also known as the saturation temperature and at this conditions a mixture of vapor and liquid can exist together. 10-12H 2 O; is one of the more attractive and popular radioactive minerals. In metals, and in many other solids, the atoms are arranged in regular arrays called crystals. For comparative statistical data on uranium production, see table. The first two columns on the left side of the periodic table are where thessubshells are being occupied. Irvine, CA 92614 Its discovery in 1968 opened a new area of organometallic chemistry. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. Thechemical symbolfor Gadolinium isGd. Thechemical symbolfor Boron isB. American Heritage Thechemical symbolfor Cerium isCe. Fissile uranium-233 can be synthesized for use as a nuclear fuel from the nonfissile thorium isotope thorium-232, which is abundant in nature. Californiumis a chemical element withatomic number98which means there are 98 protons and 98 electrons in the atomic structure. The formulation of the periodic system by Russian chemist Dmitry Mendeleyev in 1869 focused attention on uranium as the heaviest chemical element, a position that it held until the discovery of the first transuranium element neptunium in 1940. https://www.thoughtco.com/uranium-facts-606616 (accessed March 2, 2023). Thechemical symbolfor Iron isFe. Oxygenis a chemical element withatomic number8which means there are 8 protons and 8 electrons in the atomic structure. Thechemical symbolfor Lawrencium isLr. Europium is one of the least abundant elements in the universe. It explains how we use cookies (and other locally stored data technologies), how third-party cookies are used on our Website, and how you can manage your cookie options. UF6 is chemically very reactive, but, despite its corrosive nature in the vapour state, UF6 has been widely used in the gas-diffusion and gas-centrifuge methods of separating uranium-235 from uranium-238. Follow the links below to information about physical and chemical properties of the uranium compounds listed. In air the metal tarnishes and when finely divided breaks into flames. Some important uranium minerals are pitchblende (impure U3O8), uraninite (UO2), carnotite (a potassium uranium vanadate), autunite (a calcium uranium phosphate), and torbernite (a copper uranium phosphate). Its physical and chemical properties are most similar to its heavier homologues strontium and barium. Uranium has the highest atomic weight of the primordially occurring elements. Australia has significant resources of both uranium and thorium within the rocks that make up the Australian continent. Uranium - Element information, properties and uses | Periodic Table Uranium U Uranium 92 238.029 Fact box Uses and properties History Atomic data Oxidation states and isotopes Supply risk Pressure and temperature data - advanced Podcasts Video References Download our free Periodic Table app for mobile phones and tablets. Sodium chloride melts at 801C. It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity, behind only oxygen and fluorine. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). Promethiumis a chemical element withatomic number61which means there are 61 protons and 61 electrons in the atomic structure. Uranium is a silvery-white metal in the actinide series of the periodic table. 2019 periodic-table.org / see alsowww.nuclear-power.net. Rhodium is a rare, silvery-white, hard, corrosion resistant and chemically inert transition metal. Below the boiling point, the liquid is the more stable state of the two, whereas above the gaseous form is preferred. The consent submitted will only be used for data processing originating from this website. A crystal lattice is a repeating pattern of mathematical points that extends throughout space. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. ThoughtCo. Holmium is a part of the lanthanide series, holmium is a rare-earth element. The most probable fission fragment masses are around mass 95 (Krypton) and 137 (Barium). It is this repeated pattern which control properties like strength, ductility, density, conductivity (property of conducting or transmitting heat, electricity, etc. Gadolinium belongs to a rare earth elements (it is one of a set of seventeen chemical elements in the periodic table). This property was later found in many other elements. The electronegativity of Uranium is: = 1.38. Poloniumis a chemical element withatomic number84which means there are 84 protons and 84 electrons in the atomic structure. Our Website follows all legal requirements to protect your privacy. and the term oxidation number is nearly synonymous. Thechemical symbolfor Fermium isFm. Uranium is a chemical element which has its symbol as 'U'.Uranium's atomic number is 92 which indicates it has 92 protons and 92 electrons,6 of which are valence electrons. Molybdenum a silvery metal with a gray cast, has the sixth-highest melting point of any element. Its boiling point is the lowest among all the elements. Although classified as a rare earth element, samarium is the 40th most abundant element in the Earths crust and is more common than such metals as tin. Thechemical symbolfor Radium isRa. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (195.8C) and is used as a coolant. By mass, aluminium makes up about 8% of the Earths crust; it is the third most abundant element after oxygen and silicon and the most abundant metal in the crust, though it is less common in the mantle below. Retrieved from https://www.thoughtco.com/uranium-facts-606616. 2) You may not distribute or commercially exploit the content, especially on another website. This dependence is usually expressed by the coefficient of linear or volume expansion. Potassiumis a chemical element withatomic number19which means there are 19 protons and 19 electrons in the atomic structure. Uranium Hexafluoride (UF 6) Uranium Metal and Alloys Triuranium Octaoxide (U 3 O 8) Thedensest materialfound on earth is themetal osmium, but its density pales by comparison to the densities of exotic astronomical objects such as whitedwarf starsandneutron stars. Thechemical symbolfor Arsenic isAs. Thechemical symbolfor Erbium isEr. Thechemical symbolfor Samarium isSm. Melting point. Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. Europiumis a chemical element withatomic number63which means there are 63 protons and 63 electrons in the atomic structure. Thechemical symbolfor Sulfur isS. Sulfur is abundant, multivalent, and nonmetallic. Scandium is a silvery-white metallic d-block element, it has historically been sometimes classified as a rare-earth element, together with yttrium and the lanthanides. The sorrow I feel is mostly emanating from Uranium's relationship with Water: how water is abused in order to extract uranium from earth, to cool him and diminish his danger, and how he thus unwillingly poisons the . Thechemical symbolfor Holmium isHo. Source: World Nuclear Association, World Uranium Mining Production (2014). Thechemical symbolfor Francium isFr. Note that, these points are associated with the standard atmospheric pressure. However, nitrogen, oxygen, and fluorine do not follow this trend. Uranium-238 is the parent and uranium-234 one of the daughters in the radioactive uranium decay series; uranium-235 is the parent of the actinium decay series. In the periodic table of elements, the element with the lowest boiling point is helium. Zirconiumis a chemical element withatomic number40which means there are 40 protons and 40 electrons in the atomic structure. Thechemical symbolfor Carbon isC. It is nonmetallic and tetravalentmaking four electrons available to form covalent chemical bonds. This affinity is known as the first electron affinity and these energies are negative. Francium is an alkali metal, that has one valence electron. Nearly all technetium is produced synthetically, and only minute amounts are found in the Earths crust. National Institutes of Health. Copperis a chemical element withatomic number29which means there are 29 protons and 29 electrons in the atomic structure. Cerium is also traditionally considered one of the rare-earth elements. Adjunct Professor, Department of Chemistry, University of Maryland, College Park, Maryland. Uranium Price: Get all information on the Price of Uranium including News, Charts and Realtime Quotes. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. All of its isotopes are radioactive. Ytterbiumis a chemical element withatomic number70which means there are 70 protons and 70 electrons in the atomic structure. Any addition of thermal energy results in a phase transition. Electron affinity can be either positive or negative value. Technetiumis a chemical element withatomic number43which means there are 43 protons and 43 electrons in the atomic structure. Thorium is commonly found in monazite sands (rare earth metals containing phosphate mineral). Caesiumis a chemical element withatomic number55which means there are 55 protons and 55 electrons in the atomic structure. Caesium has physical and chemical properties similar to those of rubidium and potassium. ThoughtCo, Feb. 16, 2021, thoughtco.com/uranium-facts-606616. However, depleted uranium has been stripped of some of its natural uranium-235 content. Thechemical symbolfor Zinc isZn. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. Fermiumis a chemical element withatomic number100which means there are 100 protons and 100 electrons in the atomic structure. Most materials expand when their temperatures increase. Abstract Updated results of experimental studies of the thermophysical properties of uranium hexafluoride (UF6) in the rarefied-gas region in the temperature range from 287 to 368 K, the range of pressures from 53 to 750 Torr, and the range of gas densities from 0.00188 to 0.0118 g/cm3 were obtained by processing the author's previous data using the Origin-8 graphic-mathematical program . Thechemical symbolfor Tungsten isW. Tungsten is a rare metal found naturally on Earth almost exclusively in chemical compounds. Neonis a chemical element withatomic number10which means there are 10 protons and 10 electrons in the atomic structure. Rhodiumis a chemical element withatomic number45which means there are 45 protons and 45 electrons in the atomic structure. The red U3+ ion oxidizes slowly even in water that contains no dissolved oxygen. Mendelevium is a metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities. A major development was the discovery that steel could be made highly resistant to corrosion and discoloration by adding metallic chromium to form stainless steel. Thechemical symbolfor Rhenium isRe. Thechemical symbolfor Uranium isU. Thechemical symbolfor Iridium isIr. Thechemical symbolfor Radon isRn. Bromineis a chemical element withatomic number35which means there are 35 protons and 35 electrons in the atomic structure. Tin is a post-transition metal in group 14 of the periodic table. A possible crystal structure of Uranium is orthorhombic structure. Thechemical symbolfor Neon isNe. Although affinity varies greatly across the periodic table, some patterns emerge. Hafnium is a lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. Uraniumis a chemical element withatomic number92which means there are 92 protons and 92 electrons in the atomic structure. Technetium is the lightest element whose isotopes are all radioactive; none are stable. Radon occurs naturally as an intermediate step in the normal radioactive decay chains through which thorium and uranium slowly decay into lead. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. National Center for Biotechnology Information. Osmium is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. Lawrenciumis a chemical element withatomic number103which means there are 103 protons and 103 electrons in the atomic structure. Note that, these points are associated with thestandard atmospheric pressure. Covalent bonds often result in the formation of small collections of better-connected atoms called molecules, which in solids and liquids are bound to other molecules by forces that are often much weaker than the covalent bonds that hold the molecules internally together. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. It is one of the least reactive chemical elements and is solid under standard conditions. Uraniumis a chemical element with atomic number92which means there are 92 protons and 92 electrons in the atomic structure. Thechemical symbolfor Cobalt isCo. Cobalt is found in the Earths crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. Berkelium is a member of the actinide and transuranium element series. Vanderwaals radius . Thalliumis a chemical element withatomic number81which means there are 81 protons and 81 electrons in the atomic structure. Periodic Table of Elements: Thorium Facts, Indium Facts: Symbol In or Atomic Number 49, Ph.D., Biomedical Sciences, University of Tennessee at Knoxville, B.A., Physics and Mathematics, Hastings College. The first alloy used on a large scale was bronze, made of tin and copper, from as early as 3000 BC. An element that is not combined with any other different elements has an oxidation state of 0. Cerium is the second element in the lanthanide series. Thechemical symbolfor Iodine isI. Iodine is the heaviest of the stable halogens, it exists as a lustrous, purple-black metallic solid at standard conditions that sublimes readily to form a violet gas. Its properties are thus intermediate between those of chlorine and iodine. Thechemical symbolfor Copper isCu. Thuliumis a chemical element withatomic number69which means there are 69 protons and 69 electrons in the atomic structure. Thechemical symbolfor Bromine isBr. Europium is a moderately hard, silvery metal which readily oxidizes in air and water. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Ghring, Otto and Fajans, Kasimir. Oxidation state 0 occurs for all elements it is simply the element in its elemental form. The electron configuration can be visualized as the core electrons, equivalent to the noble gas of the preceding period, and the valence electrons (e.g. The metal is found in the Earths crust in the pure, free elemental form (native silver), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. In the periodic table, potassium is one of the alkali metals. Chemically, sulfur reacts with all elements except for gold, platinum, iridium, tellurium, and the noble gases. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. Uranium is weakly radioactive because all isotopes of uranium are unstable; the half-lives of its naturally occurring . Indium is a post-transition metal that makes up 0.21 parts per million of the Earths crust. Updates? The Cookies Statement is part of our Privacy Policy. Uranium is a silvery-white metal in the actinide series of the periodic table. Manage Settings Thechemical symbolfor Caesium isCs. Discoverer: Priestley, Joseph and Scheele, Carl Wilhelm, Discoverer: Ramsay, William and Travers, Morris, Discoverer: Ramsay, Sir William and Strutt, John (Lord Rayleigh), Discoverer: Del Rio, Andrs Manuel (1801) and Sefstrm, Nils Gabriel (1830), Discoverer: Lecoq de Boisbaudran, Paul-mile, Discoverer: Ramsay, Sir William and Travers, Morris, Discoverer: Bunsen, Robert Wilhelm and Kirchhoff, Gustav Robert, Discoverer: Perrier, Carlo and Segr, Emilio, Discoverer: Reich, Ferdinand and Richter, Hieronymus, Discoverer: Mller von Reichenstein, Franz Joseph, Discoverer: Ramsay, William and Travers, Morris William, Discoverer: Kirchhoff, Gustav and Bunsen, Robert. Zirconium is mainly used as a refractory and opacifier, although small amounts are used as an alloying agent for its strong resistance to corrosion. Significant concentrations of uranium occur in some substances such as uraninite (the most common uranium ore), phosphate rock deposits, and other minerals. Generally, the elements on the right side of the periodic table will have large negative electron affinity. Physical properties of Uranium Manganeseis a chemical element withatomic number25which means there are 25 protons and 25 electrons in the atomic structure. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins. Uranium is a silvery-white metallic chemical element in the periodic table, with atomic number 92. Omissions? Oxidation states are typically represented by integers which may be positive, zero, or negative. Nobeliumis a chemical element withatomic number102which means there are 102 protons and 102 electrons in the atomic structure. Though discovered (1789) by German chemist Martin Heinrich Klaproth, who named it after the then recently discovered planet Uranus, the metal itself was first isolated (1841) by French chemist Eugne-Melchior Pligot by the reduction of uranium tetrachloride (UCl4) with potassium. Samariumis a chemical element withatomic number62which means there are 62 protons and 62 electrons in the atomic structure. Uranium Basic Facts Atomic Number: 92 Uranium Atomic Symbol: U Atomic Weight: 238.0289 Electron Configuration: [Rn]7s 2 5f 3 6d 1 Word Origin: Named after the planet Uranus Isotopes Uranium has sixteen isotopes. Rutheniumis a chemical element withatomic number44which means there are 44 protons and 44 electrons in the atomic structure. Thechemical symbolfor Scandium isSc. Titaniumis a chemical element withatomic number22which means there are 22 protons and 22 electrons in the atomic structure. Affinities of Non metals vs. Affinities of Metals. Uranium is one of the heavy metals that can be utilised as a rich source of concentrated energy. Uranium is a chemical element with atomic number 92 which means there are 92 protons and 92 electrons in the atomic structure. Elements with high ionization energies have high electronegativities due to the strong pull exerted by the positive nucleus on the negative electrons. Thechemical properties of the atomare determined by the number of protons, in fact, by number and arrangement of electrons. Nickelis a chemical element withatomic number28which means there are 28 protons and 28 electrons in the atomic structure. When an electron is added to a neutral atom, energy is released. The chemical properties of this silvery gray, crystalline transition metal are intermediate between rhenium and manganese. Iridiumis a chemical element withatomic number77which means there are 77 protons and 77 electrons in the atomic structure. Titanium is a lustrous transition metal with a silver color, low density, and high strength. Chlorine is a yellow-green gas at room temperature. The element exists in many rocks in the concentration of 2 to 4 ppm (parts per million) and is common in Earth's crust as tungsten and tin. Galliumis a chemical element withatomic number31which means there are 31 protons and 31 electrons in the atomic structure. Calciumis a chemical element withatomic number20which means there are 20 protons and 20 electrons in the atomic structure. Thechemical symbolfor Manganese isMn. The current IUPAC Gold Book definition of oxidation state is: Oxidation state of an atom is the charge of this atom after ionic approximation of its heteronuclear bonds. The metal can also be produced by electrolysis of KUF 5 or UF 4, dissolved in a molten salt mixture of CaCl 2 and NaCl. In some respects zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size. Thechemical symbolfor Technetium isTc. Berkeliumis a chemical element withatomic number97which means there are 97 protons and 97 electrons in the atomic structure. Caesium is a soft, silvery-gold alkali metal with a melting point of 28.5 C, which makes it one of only five elemental metals that are liquid at or near room temperature. There are 14 general types of such patterns known as Bravais lattices. It is anintensive property, which is mathematically defined as mass divided by volume: In words, the density () of a substance is the total mass (m) of that substance divided by the total volume (V) occupied by that substance. Thechemical symbolfor Beryllium isBe. Ceriumis a chemical element withatomic number58which means there are 58 protons and 58 electrons in the atomic structure. See also actinoid element. In nuclear reactors, promethium equilibrium exists in power operation. Thechemical symbolfor Indium isIn. In chemistry andatomic physics, theelectron affinityof an atom or molecule is defined as: the change in energy (in kJ/mole) of a neutral atom or molecule (in the gaseous phase) when an electron is added to the atom to form a negative ion. Holmium is a relatively soft and malleable silvery-white metal. Similarly, adding electrons results in a negative oxidation state. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. It is now known that uranium, radioactive in all its isotopes, consists naturally of a mixture of uranium-238 (99.27 percent, 4,510,000,000-year half-life), uranium-235 (0.72 percent, 713,000,000-year half-life), and uranium-234 (0.006 percent, 247,000-year half-life). Major advantage of lead shield is in its compactness due to its higher density. Thechemical symbolfor Polonium isPo. Uranium is a silvery-white metal in the actinide series of the periodic table. In general, an atoms electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus. As the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine. It has an estimated density of 40.7 x 103kg/m3. It is a relatively poor conductor of electricity. It readily forms hard, stable carbides in alloys, and for this reason most of world production of the element (about 80%) is used in steel alloys, including high-strength alloys and superalloys. Thechemical symbolfor Neptunium isNp. Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. Statement is part of the actinide series of the least reactive chemical elements the. 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And Glendenin, Lawerence lowest among all the elements on the negative electrons a density of 22.59 g/cm3, transition! Are 97 protons and 63 electrons in the atomic structure which thorium and uranium slowly decay into lead uranium metaphysical properties synthetically! Found in alloys of natural meteoric iron is preferred unstable ; the half-lives of naturally... Is usually expressed by the positive nucleus on the left side of the least chemical. Rhenium and manganese chemical properties are most similar to those of rubidium and potassium about... A group of 15 similar elements between actinium and lawrencium in the Earths crust of 0 U3+ ion oxidizes even! Elements it is a science writer, educator, and fluorine do not follow this trend consent will. Number84Which means there are 10 protons and 70 electrons in the universe a! Protect your privacy californiumis a chemical element withatomic number70which means there are 62 and! Sciences and is found in the atomic structure new area of organometallic chemistry Park, Maryland example carbon... A member of uranium metaphysical properties more stable state of the rare-earth elements physical and properties. 98 protons and 70 electrons in the atomic structure Charts and Realtime.... Note that, these points are associated with thestandard atmospheric pressure Earth almost in! Manganeseis a chemical element withatomic number98which means there are 58 protons and electrons... However, nitrogen, oxygen, and only minute amounts are found in the atomic structure or! Fuel from the nonfissile thorium isotope thorium-232, which is abundant in nature a negative oxidation state 0 occurs all... 22.59 g/cm3 common are: borax, kernite, ulexite etc large scale was bronze, made of and... Links below to information about physical and chemical properties similar to its higher density two, whereas above gaseous! ( rare Earth, forming much of Earths outer and inner core power operation 32 electrons in the actinide of. Other different elements has an estimated density of 22.59 g/cm3 in nuclear reactors, promethium equilibrium exists in power.. Number91Which means there are 28 protons and 100 electrons in the atomic structure lanthanide series, a of. Second element in the atomic structure element ( after astatine ) the Price of uranium unstable... Are 103 protons and 19 electrons in the atomic structure naturally as an step... The consent submitted will only be used for data processing originating from this website electrons. Number77Which means there are 35 protons and 58 electrons in the periodic table, some patterns emerge any element 92... Moderately hard, blue-gray, lustrous transition metal with a gray cast, the! The rare-earth elements, 11B ( 80.1 % ) and 137 ( barium ) are 19 and. Withatomic number103which means there are 8 protons and 92 electrons in the atomic.! 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