It has the atomic number of 55 and has an atomic mass of 133 moles/gram. Francium is a highly radioactive metal that decays into astatine, radium, and radon. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels. Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. The chemical symbol for Iron is Fe. Lead is a heavy metal that is denser than most common materials. Curium is a chemical element with atomic number 96 which means there are 96 protons and 96 electrons in the atomic structure. The bulk properties of astatine are not known with any certainty. Cadmium is a soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Copper is a chemical element with atomic number 29 which means there are 29 protons and 29 electrons in the atomic structure. Radium is a chemical element with atomic number 88 which means there are 88 protons and 88 electrons in the atomic structure. Nitrogen is a chemical element with atomic number 7 which means there are 7 protons and 7 electrons in the atomic structure. This fact has key implications for the building up of the periodic table of elements. is a rare earth element with a metallic silver luster. Carbon is one of the few elements known since antiquity. Thorium metal is silvery and tarnishes black when exposed to air, forming the dioxide. It occurs on Earth as the decay product of various heavier elements. Aluminum is a chemical element with atomic number 13 which means there are 13 protons and 13 electrons in the atomic structure. The chemical symbol for Tellurium is Te. 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, Andrés Manuel (1801) and Sefström, Nils Gabriel (1830), Discoverer: Lecoq de Boisbaudran, Paul-Émile, Discoverer: Ramsay, Sir William and Travers, Morris, Discoverer: Bunsen, Robert Wilhelm and Kirchhoff, Gustav Robert, Discoverer: Perrier, Carlo and Segrè, Emilio, Discoverer: Reich, Ferdinand and Richter, Hieronymus, Discoverer: Müller von Reichenstein, Franz Joseph, Discoverer: Ramsay, William and Travers, Morris William, Discoverer: Kirchhoff, Gustav and Bunsen, Robert. Atomic weight (average mass of the atom): 132.90 4. Also used in photoelectric cells, atomic clocks, infared lamps. 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). Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 electrons in the atomic structure. It is the least abundant of the five non-radioactive alkali metals. Tellurium is chemically related to selenium and sulfur. The chemical symbol for Protactinium is Pa. Protactinium is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. The most probable fission fragment masses are around mass 95 (Krypton) and 137 (Barium). Sodium is a soft, silvery-white, highly reactive metal. Although neodymium is classed as a rare earth, it is a fairly common element. Few cesium mineral are know, pollucite is the main: they are silicate magmas cooled from granites. The chemical symbol for Promethium is Pm. Thallium is a soft gray post-transition metal is not found free in nature. The chemical symbol for Nobelium is No. A freshly exposed surface of pure copper has a reddish-orange color. Fermium is a member of the actinide series. The chemical symbol for Rhodium is Rh. Atomic symbol (on the periodic table of elements): Cs 3. The chemical symbol for Thulium is Tm. Lead is a chemical element with atomic number 82 which means there are 82 protons and 82 electrons in the atomic structure. Plutonium is a chemical element with atomic number 94 which means there are 94 protons and 94 electrons in the atomic structure. It is the heaviest essential mineral nutrient. The chemical symbol for Bromine is Br. The chemical symbol for Thorium is Th. We use cookies to ensure that we give you the best experience on our website. Notes on the properties of Cesium: Specific Heat: Value given for solid phase. Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. Strontium is a chemical element with atomic number 38 which means there are 38 protons and 38 electrons in the atomic structure. The chemical symbol for Antimony is Sb. It was calculated from the global average river input. Thorium is commonly found in monazite sands (rare earth metals containing phosphate mineral). Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. Einsteinium is the seventh transuranic element, and an actinide. Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 electrons in the atomic structure. The chemical symbol for Cobalt is Co. Cobalt is found in the Earth’s crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The chemical symbol for Chromium is Cr. Caesium or cesium is a chemical element with symbol Cs and atomic number 55. Discoverer: Davy, Sir H. and Thénard, L.-J. Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles. The chemical symbol for Iodine is I. 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. Indium is a post-transition metal that makes up 0.21 parts per million of the Earth’s crust. Holmium is a relatively soft and malleable silvery-white metal. Berkelium is a member of the actinide and transuranium element series. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. Sulfur is a chemical element with atomic number 16 which means there are 16 protons and 16 electrons in the atomic structure. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3. Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. Radon is a radioactive, colorless, odorless, tasteless noble gas. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. Francium is a chemical element with atomic number 87 which means there are 87 protons and 87 electrons in the atomic structure. Beryllium is a chemical element with atomic number 4 which means there are 4 protons and 4 electrons in the atomic structure. The chemical symbol for Americium is Am. In the periodic table, the elements are listed in order of increasing atomic number Z. Cesium, an alkali metal, occurs in lepidolite, pollucte (a hydrated silicate of aluminum and cesium), and in other sources. Zirconium is a lustrous, grey-white, strong transition metal that resembles hafnium and, to a lesser extent, titanium. Thorium is a chemical element with atomic number 90 which means there are 90 protons and 90 electrons in the atomic structure. Cesium reacts explosively with cold water, and reacts with ice at temperatures above -116C. It is a lanthanide, a rare earth element, originally found in the gadolinite mine in Ytterby in Sweden. The chemical symbol for Dysprosium is Dy. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. The chemical symbol for Molybdenum is Mo. Cesium hydroxide, the strongest base known, attacks glass. Hafnium is a chemical element with atomic number 72 which means there are 72 protons and 72 electrons in the atomic structure. The chemical symbol for Manganese is Mn. Thulium is a chemical element with atomic number 69 which means there are 69 protons and 69 electrons in the atomic structure. Lanthanum is a soft, ductile, silvery-white metal that tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. Cesium Cs 137 is a radioactive isotope of cesium with an atomic mass of 139 and potential application in radiotherapy. Vanadium is a chemical element with atomic number 23 which means there are 23 protons and 23 electrons in the atomic structure. Cesium is also used in atomic clocks, in photoelectric cells and as a catalyst in the hydrogenation of certain organic compounds. Gallium does not occur as a free element in nature, but as gallium(III) compounds in trace amounts in zinc ores and in bauxite. The chemical symbol for Mercury is Hg. Samarium is a typical member of the lanthanide series, it is a moderately hard silvery metal that readily oxidizes in air. Neptunium is the first transuranic element. 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. Titanium is a chemical element with atomic number 22 which means there are 22 protons and 22 electrons in the atomic structure. Although cesium is much less abundant than the other alkali metals, it is still more common than elements like arsenic, iodine and uranium. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl. The chemical symbol for Oxygen is O. Rubidium is a chemical element with atomic number 37 which means there are 37 protons and 37 electrons in the atomic structure. Our cesium page has over 290 facts that span 97 different quantities. Atomic number (number of protons in the nucleus): 55 2. All of its isotopes are radioactive. Erbium is a silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. The chemical symbol for Einsteinium is Es. The chemical symbol for Sodium is Na. Oxygen is a colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air. Atomic Number – Does it conserve in a nuclear reaction? Dysprosium is used for its high thermal neutron absorption cross-section in making control rods in nuclear reactors, for its high magnetic susceptibility in data storage applications. Berkelium is a chemical element with atomic number 97 which means there are 97 protons and 97 electrons in the atomic structure. The chemical symbol for Copper is Cu. At the same time, 3D data collection was proliferating around the world, driving a need for software and standards that could unleash its potential. It is obtained chiefly from the mineral cassiterite, which contains tin dioxide. Tin is a chemical element with atomic number 50 which means there are 50 protons and 50 electrons in the atomic structure. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. But its density pales by comparison to the densities of exotic astronomical objects such as white dwarf stars and neutron stars. Mercury is commonly known as quicksilver and was formerly named hydrargyrum. Nearly all technetium is produced synthetically, and only minute amounts are found in the Earth’s crust. Niobium is a soft, grey, ductile transition metal, often found in the minerals pyrochlore (the main commercial source for niobium) and columbite. al. The device was based on a prism which separated light from a flame into a rainbow of colors. Cesium Cs 137 is prevalent due to its spontaneous production, which occurs as a result of nuclear fission of other radioactive materials, such as uranium and plutonium. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. Atomic structure of Cesium includes atomic number, atomic weight, electron configuration Iodine is the least abundant of the stable halogens, being the sixty-first most abundant element. The metal is characterized by a spectrum containing two bright lines in the blue along with several others in the red, yellow, and green wavelengths. Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. One of the world's richest sources of cesium is located at Bernic Lake, Manitoba. Radon is a chemical element with atomic number 86 which means there are 86 protons and 86 electrons in the atomic structure. Molybdenum a silvery metal with a gray cast, has the sixth-highest melting point of any element. Because of its high chemical reactivity, barium is never found in nature as a free element. Lutetium is a silvery white metal, which resists corrosion in dry air, but not in moist air. By mass, aluminium makes up about 8% of the Earth’s 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. The chemical symbol for Phosphorus is P. As an element, phosphorus exists in two major forms—white phosphorus and red phosphorus—but because it is highly reactive, phosphorus is never found as a free element on Earth. Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. 3. The chemical symbol for Argon is Ar. Mendelevium is a chemical element with atomic number 101 which means there are 101 protons and 101 electrons in the atomic structure. Terbium is a chemical element with atomic number 65 which means there are 65 protons and 65 electrons in the atomic structure. Cesium Page One. Rhodium is a rare, silvery-white, hard, corrosion resistant and chemically inert transition metal. Gold is a transition metal and a group 11 element. Actinium is a chemical element with atomic number 89 which means there are 89 protons and 89 electrons in the atomic structure. The chemical symbol for Polonium is Po. Mercury is a chemical element with atomic number 80 which means there are 80 protons and 80 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. Commercially, thallium is produced as a byproduct from refining of heavy metal sulfide ores. 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. Its properties are thus intermediate between those of chlorine and iodine. Elemental sulfur is a bright yellow crystalline solid at room temperature. Polonium is a chemical element with atomic number 84 which means there are 84 protons and 84 electrons in the atomic structure. Zinc is a chemical element with atomic number 30 which means there are 30 protons and 30 electrons in the atomic structure. It is even less abundant than the so-called rare earths. The chemical symbol for Krypton is Kr. Caesium is a chemical element with atomic number 55 which means there are 55 protons and 55 electrons in the atomic structure. Its extreme rarity in the Earth’s crust, comparable to that of platinum. See also: Atomic Number – Does it conserve in a nuclear reaction? Scandium is a chemical element with atomic number 21 which means there are 21 protons and 21 electrons in the atomic structure. The chemical symbol for Mendelevium is Md. The chemical symbol for Ytterbium is Yb. Copper is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. Discoverer: Corson, Dale R. and Mackenzie, K. R. The actinide or actinoid series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium. The chemical symbol for Rhenium is Re. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. Its chief compounds are the chloride and the nitrate. Residence time The cesium residence time is from Tracers in the Sea (Broecker, W. S. and Peng, T.-H., 1982. The chemical symbol for Sulfur is S. Sulfur is abundant, multivalent, and nonmetallic. Cerium is also traditionally considered one of the rare-earth elements. Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 electrons in the atomic structure. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. It is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. Caesiumis a soft metal of yellowish color, which is very highly reactive and can explode in water. It is fairly soft and slowly tarnishes in air. The chemical symbol for Niobium is Nb. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. The name samarium is after the mineral samarskite from which it was isolated. Density: 1.086 ounces per cubic inch (1.879 grams per cubic centimeter) 5. Plutonium is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. The chemical symbol for Lutetium is Lu. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. Although classified as a rare earth element, samarium is the 40th most abundant element in the Earth’s crust and is more common than such metals as tin. The name xenon for this gas comes from the Greek word ξένον [xenon], neuter singular form of ξένος [xenos], meaning ‘foreign(er)’, ‘strange(r)’, or ‘guest’. The chemical symbol for Titanium is Ti. It is the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities. Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. The chemical symbol for Calcium is Ca. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. Number of natural isotopes (atoms of the same ele… The chemical symbol for Astatine is At. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). Antimony is a lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite. Classified as a n alkali metal, Cesium is a solid at room temperature. These elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare earth elements. The metal is found in the Earth’s 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. The chemical properties of the atom are determined by the number of protons, in fact, by number and arrangement of electrons. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. Iodine is a chemical element with atomic number 53 which means there are 53 protons and 53 electrons in the atomic structure. Barium is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Caesium is a chemical element with atomic number 55 which means there are 55 protons in its nucleus. Neodymium is a soft silvery metal that tarnishes in air. The chemical symbol for Magnesium is Mg. Magnesium is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure. Discoverer: McMillan, Edwin M. and Abelson, Philip H. Discoverer: Glenn T. Seaborg, Joseph W. Kennedy, Edward M. McMillan, Arthur C. Wohl, Discoverer: Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso, Discoverer: Glenn T. Seaborg, Ralph A. James, Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Kenneth Street, Jr., Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Bernard G. Harvey, Gregory R. Choppin, Albert Ghiorso, Discoverer: Albert Ghiorso, Glenn T. Seaborg, Torbørn Sikkeland, John R. Walton, Discoverer: Albert Ghiorso, Torbjørn Sikkeland, Almon E. Larsh, Robert M. Latimer, Copyright 2020 Periodic Table | All Rights Reserved |. Ruthenium is a rare transition metal belonging to the platinum group of the periodic table. Platinum is one of the least reactive metals. In the periodic table, potassium is one of the alkali metals. The chemical symbol for Platinum is Pt. It is silvery white, soft, and ductile. Samarium is a chemical element with atomic number 62 which means there are 62 protons and 62 electrons in the atomic structure. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. Chemically, sulfur reacts with all elements except for gold, platinum, iridium, tellurium, and the noble gases. The chemical symbol for Strontium is Sr. Strontium is an alkaline earth metal, strontium is a soft silver-white yellowish metallic element that is highly reactive chemically. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. The nucleus is composed of protons and neutrons. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant. Gold is a chemical element with atomic number 79 which means there are 79 protons and 79 electrons in the atomic structure. The chemical symbol for Zirconium is Zr. 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