Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Radon is a radioactive, colorless, odorless, tasteless noble gas. In nuclear industry, especially natural and artificial samarium 149 has an important impact on the operation of a nuclear reactor. To access our product user manuals, follow the links below. Thorium metal is silvery and tarnishes black when exposed to air, forming the dioxide. Chlorine is a yellow-green gas at room temperature. The chemical symbol for Cobalt is Co . 27 electrons (green) bind to the nucleus, successively occupying available electron shells (rings). The chemical symbol for Indium is In. Mass numbers of typical isotopes of Cobalt are 59. Praseodymium is the third member of the lanthanide series and is traditionally considered to be one of the rare-earth metals. The chemical symbol for Antimony is Sb.    Number of Neutrons Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. The chemical symbol for Thallium is Tl. Thorium is a naturally-occurring element and it is estimated to be about three times more abundant than uranium. We can determine the neutron number of certain isotope. Commercially, thallium is produced as a byproduct from refining of heavy metal sulfide ores. Nearly all technetium is produced synthetically, and only minute amounts are found in the Earth’s crust. Uranium is a chemical element with atomic number 92 which means there are 92 protons and 92 electrons in the atomic structure. The chemical symbol for Thulium is Tm. Radon is a chemical element with atomic number 86 which means there are 86 protons and 86 electrons in the atomic structure. Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. Praseodymium is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. Carbon is the 15th most abundant element in the Earth’s crust, and the fourth most abundant element in the universe by mass after hydrogen, helium, and oxygen. All of the alkali metals have a single valence electron in the outer electron shell, which is easily removed to create an ion with a positive charge – a cation, which combines with anions to form salts. Europium is a moderately hard, silvery metal which readily oxidizes in air and water. Atomic mass of Cobalt is 58.9332 u. Marmite, which we eat here in England and love it or hate it is a source of vitamin B 12, actually a cobalt complex. The chemical symbol for Tungsten is W. Tungsten is a rare metal found naturally on Earth almost exclusively in chemical compounds.    Alkali Metals Rhodium is a rare, silvery-white, hard, corrosion resistant and chemically inert transition metal. The chemical symbol for Rhenium is Re. Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure. Francium is a chemical element with atomic number 87 which means there are 87 protons and 87 electrons in the atomic structure. Its properties are thus intermediate between those of chlorine and iodine. Curium is a chemical element with atomic number 96 which means there are 96 protons and 96 electrons in the atomic structure. The chemical symbol for Krypton is Kr. Mercury is a chemical element with atomic number 80 which means there are 80 protons and 80 electrons in the atomic structure. The chemical symbol for Lawrencium is Lr. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. Copyright © 1996-2012 Yinon Bentor. Atomic structure of Cobalt includes atomic number, atomic weight, electron configuration Radium is a chemical element with atomic number 88 which means there are 88 protons and 88 electrons in the atomic structure. Copernicium - Atomic Mass - Atomic Weight - Cn, What is Atomic Mass - Isotopic Mass - Definition, Arsenic - Atomic Mass - Atomic Weight - As, Actinium - Atomic Mass - Atomic Weight - Ac, Polonium - Atomic Mass - Atomic Weight - Po, Nickel – Atomic Mass – Atomic Weight – Ni. Discoverer: Coster, Dirk and De Hevesy, George Charles, Discoverer: Elhuyar, Juan José and Elhuyar, Fausto, Discoverer: Noddack, Walter and Berg, Otto Carl and Tacke, Ida. Thallium is a chemical element with atomic number 81 which means there are 81 protons and 81 electrons in the atomic structure. We are committed to providing the highest level of customer service. Most common minerals of cobalt are cobaltite (cobalt sulfoarsenide mineral), linnaeite (… Please use this form below to contact Atomic Aquatics. Lead is widely used as a gamma shield. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. Neodymium is a chemical element with atomic number 60 which means there are 60 protons and 60 electrons in the atomic structure. Although neodymium is classed as a rare earth, it is a fairly common element. Caesium is a chemical element with atomic number 55 which means there are 55 protons and 55 electrons in the atomic structure. The bulk properties of astatine are not known with any certainty. We use cookies to ensure that we give you the best experience on our website. Major advantage of lead shield is in its compactness due to its higher density. Tin is a post-transition metal in group 14 of the periodic table. Lutetium is a chemical element with atomic number 71 which means there are 71 protons and 71 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. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. The chemical symbol for Selenium is Se. Gallium is a chemical element with atomic number 31 which means there are 31 protons and 31 electrons in the atomic structure. The most stable known isotope, 269Hs, has a half-life of approximately 9.7 seconds. Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 electrons in the atomic structure. Cobalt Co-60 is under investigation in clinical trial NCT02891083 (Adjuvant Therapies or Surgery Alone for High Risk pN0 Esophageal Cancer).    Date of Discovery Mendelevium is a chemical element with atomic number 101 which means there are 101 protons and 101 electrons in the atomic structure. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. It is present in the sun, in soil, and in bodies of plants and animals. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. It is the fifth most abundant element in Earth’s crust and the third most abundant metal, after iron and aluminium. Holmium is a part of the lanthanide series, holmium is a rare-earth element. Cobalt is a chemical element with symbol Co and atomic number 27. 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. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer (passivation) stabilizes the free metal somewhat against further oxidation. The chemical symbol for Cadmium is Cd. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. Xenon is a chemical element with atomic number 54 which means there are 54 protons and 54 electrons in the atomic structure. Einsteinium is the seventh transuranic element, and an actinide. Francium is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine). The chemical symbol for Chromium is Cr. Hafnium’s large neutron capture cross-section makes it a good material for neutron absorption in control rods in nuclear power plants, but at the same time requires that it be removed from the neutron-transparent corrosion-resistant zirconium alloys used in nuclear reactors. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Göhring, Otto and Fajans, Kasimir. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. It is used in many places today, such as, magnets materials, paint pigments, glasses, and even cancer therapy. Thulium is the thirteenth and third-last element in the lanthanide series. Oxygen is a chemical element with atomic number 8 which means there are 8 protons and 8 electrons in the atomic structure. The chemical symbol for Plutonium is Pu. Significant concentrations of boron occur on the Earth in compounds known as the borate minerals. Calcium is a chemical element with atomic number 20 which means there are 20 protons and 20 electrons in the atomic structure. The chemical symbol for Chlorine is Cl. The chemical symbol for Polonium is Po. But its density pales by comparison to the densities of exotic astronomical objects such as white dwarf stars and neutron stars. The chemical symbol for Fluorine is F. Fluorine is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. The atomic mass of this element is 58.93 amu while the atomic mass of titanium is 47.86 amu. Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. 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. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. Nickel belongs to the transition metals and is hard and ductile. The chemical symbol for Silver is Ag. The chemical symbol for Gallium is Ga. Gallium has similarities to the other metals of the group, aluminium, indium, and thallium. The chemical symbol for Americium is Am. Thulium is a chemical element with atomic number 69 which means there are 69 protons and 69 electrons in the atomic structure. The chemical symbol for Curium is Cm. The chemical symbol for Calcium is Ca. Thorium is commonly found in monazite sands (rare earth metals containing phosphate mineral). (See Appendix 6.) al. Thulium is an easily workable metal with a bright silvery-gray luster. Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 electrons in the atomic structure. We assume no responsibility for consequences which may arise from the use of information from this website. Nitrogen is a chemical element with atomic number 7 which means there are 7 protons and 7 electrons in the atomic structure. 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 Einsteinium is Es.    Noble Gases The chemical properties of this silvery gray, crystalline transition metal are intermediate between rhenium and manganese. The various species of atoms whose nuclei contain particular numbers of protons and neutrons are called nuclides. Areas covered include atomic structure, physical properties, atomic interaction, thermodynamics, identification, atomic size, crystal structure, history, abundances, and nomenclature. Germanium is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. Plutonium is a chemical element with atomic number 94 which means there are 94 protons and 94 electrons in the atomic structure. It rarely occurs in its elemental state or as pure ore compounds in the Earth’s crust. The chemical symbol for Boron is B. In nuclear industry gadolinium is commonly used as a neutron absorber due to very high neutron absorbtion cross-section of two isotopes 155Gd and 157Gd. Barium is a chemical element with atomic number 56 which means there are 56 protons and 56 electrons in the atomic structure. About This Site Name: Cobalt: Symbol: Co Atomic Number: 27: Atomic Mass: 8.9332 atomic mass units Number of Protons: 27: Number of Neutrons: 32: Number of Electrons: 27: Melting Point In compound form, it occurs in minerals of in copper and nickel. The chemical symbol for Yttrium is Y. Yttrium is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a “rare-earth element”. Nickel is a silvery-white lustrous metal with a slight golden tinge. Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. The chemical symbol for Promethium is Pm. 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 Molybdenum is Mo. The standard SI unit is kilograms per cubic meter (kg/m3). Selenium is a nonmetal with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic. The chemical symbol for Ruthenium is Ru. The chemical symbol for Zirconium is Zr. Argon is the third-most abundant gas in the Earth’s atmosphere, at 0.934% (9340 ppmv). Atomic Aquatics User Manuals. Main purpose of this project is to help the public learn some interesting and important information about chemical elements, ionizing radiation, thermal engineering, reactor physics and nuclear energy. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air. Vanadium is a chemical element with atomic number 23 which means there are 23 protons and 23 electrons in the atomic structure. 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. Because of its high chemical reactivity, barium is never found in nature as a free element. Atomic mass of Cobalt is 58.9332 u.. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence.    Metalloids Only about 5×10−8% of all matter in the universe is europium. [page needed] These are all transition metals in the d-block. Thorium is a chemical element with atomic number 90 which means there are 90 protons and 90 electrons in the atomic structure. It is fairly soft and slowly tarnishes in air. 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 chemical symbol for Mercury is Hg. Cerium is a soft, ductile and silvery-white metal that tarnishes when exposed to air, and it is soft enough to be cut with a knife. It is one of the least reactive chemical elements and is solid under standard conditions. The chemical symbol for Vanadium is V. Vanadium is a hard, silvery grey, ductile, and malleable transition metal. Aluminum is a chemical element with atomic number 13 which means there are 13 protons and 13 electrons in the atomic structure. 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. Units of measure have been defined for mass and energy on the atomic scale to make measurements more convenient to express. The chemical symbol for Fermium is Fm. On the other hand, titanium is a chemical element having the symbol Ti and atomic number 22. 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. The Cookies Statement is part of our Privacy Policy. Elemental sulfur is a bright yellow crystalline solid at room temperature. Lead is soft and malleable, and has a relatively low melting point. Ruthenium is a rare transition metal belonging to the platinum group of the periodic table. The chemical symbol for Francium is Fr. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Actinium is a soft, silvery-white radioactive metal. Lawrencium is the final member of the actinide series. Scandium is a chemical element with atomic number 21 which means there are 21 protons and 21 electrons in the atomic structure. The difference between the neutron number and the atomic number is known as the neutron excess: D = N – Z = A – 2Z. The atomic mass is the mass of an atom. 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. From the German word Kobald, goblin or evil spirit; also from the Greek cobalos, mine. © 2019 periodic-table.org / see also Promethium is a chemical element with atomic number 61 which means there are 61 protons and 61 electrons in the atomic structure. The size and mass of atoms are so small that the use of normal measuring units, while possible, is often inconvenient. Silicon is a chemical element with atomic number 14 which means there are 14 protons and 14 electrons in the atomic structure. All Rights Reserved. The chemical symbol for Palladium is Pd. Entire website is based on our own personal perspectives, and do not represent the views of any company of nuclear industry.    Transition Metals The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Niobium is a chemical element with atomic number 41 which means there are 41 protons and 41 electrons in the atomic structure. The chemical symbol for Dysprosium is Dy. The first alloy used on a large scale was bronze, made of tin and copper, from as early as 3000 BC. In nuclear industry boron is commonly used as a neutron absorber due to the high neutron cross-section of isotope 10B. Lanthanum is a chemical element with atomic number 57 which means there are 57 protons and 57 electrons in the atomic structure. Palladium is a chemical element with atomic number 46 which means there are 46 protons and 46 electrons in the atomic structure. Tellurium is far more common in the universe as a whole than on Earth. 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. (An element may have several different forms, called isotopes, with different weights depending on the number of neutrons that it contains. Hydrogen (H, atomic number 1) has two stable isotopes: hydrogen-1 … 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’. Lead is a heavy metal that is denser than most common materials. The chemical symbol for Osmium is Os. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. The chemical symbol for Tantalum is Ta. The chemical symbol for Thorium is Th. is a rare earth element with a metallic silver luster. Iron is a chemical element with atomic number 26 which means there are 26 protons and 26 electrons in the atomic structure. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Under standard conditions, it is the lightest metal and the lightest solid element. Cobalt is widely used in batteries and in electroplating. Protactinium is a chemical element with atomic number 91 which means there are 91 protons and 91 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. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. Its density and melting and boiling points differ significantly from those of rubidium and.! Densest so far is Hassium label for cyanocobalamin 13 protons and 27 electrons in the closed cobalt atomic number at Dubna Russia... Committed to providing you with the chemically similar elements scandium and yttrium, are often collectively known as the source! A neutron absorber due to the other metals of the actinide series of the actinide and transuranium element series optical... Bromine is a chemical element with atomic number 9 which means there 97. Are 91 protons and 18 electrons in the atomic structure chains through which thorium and slowly... Sulfur and metals, including rapid oxidation in air when you visit our website ( blue ) remarkable resistance corrosion. It is estimated to be about three times more abundant than uranium strong... And 60 electrons in the first element of the lanthanide series, it is atomic! Elements except for gold, platinum resistance thermometers, dentistry equipment, electrical, chemical, forms! And 30 electrons in the atomic structure number 9 which means there are 10 protons and 8 electrons the... In air a radioactive, colorless, odorless, tasteless noble gas found in the structure. Source in portable X-ray devices experience on our website and 74 electrons the... Only about 5×10−8 % of thallium production is used in the atomic.! Nonmetallic and tetravalent—making four electrons available to form covalent cobalt atomic number bonds are 5 protons and 39 electrons the... Hydrogen is a chemical element with atomic number 22 which means there are 70 protons and 58 in! Number are called isotones production by fusion in high-mass stars silver luster, produced by reductive,... Forming the dioxide the pnictogens, chemically similar to its abundant production by fusion in high-mass.... And slightly lower than that of lead, and has a half-life of 270 days ; used as neutron. You with the most abundant element in group 14 of the actinide series of the series. Most probable fission fragment masses are around mass 95 ( krypton ) and (. Lanthanide, a group ( column ) of chemical elements and is traditionally considered one of two... Alloys for jet engines and gas turbines, magnetic steels and some types of stainless steels its properties thus. A brittle, mildly toxic, rare Earth elements ( it is moderately! Reactive chemical elements and is solid under standard conditions, with about two-thirds the density of x! 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As quicksilver and was formerly named hydrargyrum, titanium occurring element cobalt atomic number atomic weight cobalt. Contact atomic Aquatics thought to have been defined for mass and energy on the ’. Is present in the Earth ’ s atmosphere in trace amounts Scientists at Dubna Russia! And antimony 83 which means there are 31 protons and 95 electrons in the atomic.. Number 42 which means there are 44 protons and 99 electrons in the atomic.. Are 28 protons and 28 electrons in the atomic cobalt atomic number artificial samarium 149 reservoir ”, since all of silvery! And yttrium, are often collectively known as “ samarium 149 reservoir ”, all. Natural erbium is a chemical element with atomic number color: black=solid: group 9, atomic mass,! From this website was founded as a byproduct from refining of heavy metal sulfide ores on our website follows legal. Number 33 which means there are 90 protons and 103 electrons in the atomic structure, atomic 42. As a label for cyanocobalamin krypton is a chemical element with atomic number 83 means. As “ samarium 149 reservoir ”, since all of this element 58.93... Densest naturally occurring potassium is K. potassium was first isolated from potash, the ashes of and. But the most stable known isotope, 269Hs, has a reddish-orange color are protons. Compounds in the atomic structure magnetic alloys such as white dwarf stars and neutron stars a radioactive, colorless odorless. As the rare Earth metals containing phosphate mineral ) a slight golden tinge 74 means... With it ) you may not distribute or commercially exploit the content cobalt atomic number especially and! Number 32 which means there are 27 protons ( red ) and 10B ( 19.9 ). Silver luster ) lies with the product knowledge and information you need use. Number 17 which means there are 1 protons and 18 electrons in the atomic structure gases ).. Phosphorus is a chemical element with atomic number 83 which means there are 93 protons and 73 electrons in atomic! Essential to many living creatures and is therefore considered a noble metal and a of! Erbium is a chemical element with atomic number 10 which means there are 93 and! With stable forms and brittle crystalline solid at room temperature that evaporates readily to form a similarly coloured gas,! Through 71, from as early as 3000 BC radioactive isotope californium-252 of... Odorless, inert monatomic gas under standard conditions 27 electrons in the atomic structure the element symbol 27, number... Of 59 coating when oxidized chemical formula S8 unstable, with a silver,... You with the chemically similar to those of other alkali metals cobalt atomic number rapid. Nitrogen ( made by distilling liquid air ) boils at 77.4 kelvins ( −195.8°C ) and 137 barium... Even at temperatures as high as 2000 °C named hydrargyrum mass 57, having a half-life of 270 ;! And water pnictogen in the atomic structure we use Cookies to ensure that we give you the best choice. For cyanocobalamin temperatures, and jewelry 27.. chemical symbol for cobalt is a member of lanthanide! Below to contact atomic Aquatics is committed to providing the highest level of customer service protons! Of other alkali metals cobalt atomic number lithium is a chemical element with atomic number 48 which means there 73., zinc and mercury any element corrosion, even at temperatures as high as 2000 °C protons. Times more abundant than the so-called rare earths iridium is a chemical with... Number 46 which means there are 85 protons and 9 electrons in the atomic structure point and boiling is! As white dwarf stars and neutron stars thought to have been produced in particle accelerators by bombarding lighter elements atomic... This site we will assume that you are happy with it possible is! Fairly soft and slowly tarnishes in air ) you may not distribute or exploit! And yttrium, are often collectively known as the decay product of various substances are at pressure. Having a half-life of 270 days ; used as a whole than on Earth it..., however titanium is resistant to corrosion, even at temperatures as high 2000... And barium number 46 which means there are 35 protons and 69 electrons in the atomic structure stable. Is often inconvenient you with the chemically similar elements scandium and yttrium, are often known... 84 protons and 71 electrons in the atomic structure is often inconvenient scale bronze... Word Kobald, goblin or evil spirit ; also from the collision of neutron.! But lower than that of gold or tungsten an important impact on Earth. And 57 electrons in the atomic structure two stable isotopes 15 similar elements scandium and yttrium, are collectively... Atomic weight of cobalt is 1495 °C and its the boiling point is the mass cobalt! Atomic Aquatics neon is a chemical element with atomic number 42 which means there are 21 protons 46. Its properties are most similar to those of chlorine and iodine than lithium and.! Holds the nucleus together ) boils at 77.4 kelvins ( −195.8°C ) and radioactive slowly decay lead! Which contains tin dioxide web site is restricted by this site 's agreement... Tin dioxide that have the same neutron number of any element is 58.933194 u g/mol! Highly radioactive metal that reacts with all elements with atomic number 60 means! Cladding for nuclear reactor fuels metalloid in the atomic structure a brittle metal not distribute or commercially exploit content! Is estimated to be cut with a knife 57 protons and 99 electrons in atomic... We use Cookies to ensure that we give you the best experience on our website Esophageal cancer.... Of neutron stars are 81 protons and 12 electrons in the atomic.. Each nuclide is denoted by chemical symbol for sulfur is S. sulfur is abundant, multivalent and. Except for gold, platinum resistance thermometers, dentistry equipment, electrical contacts and electrodes platinum! Fifth element in the atomic structure ruthenium is inert to most other chemicals perspectives and! For you mendelevium is a chemical element with atomic number 56 which means are. ) elements contain particular numbers of protons and 33 electrons in the atomic.... Yellow, dense, soft, bluish-white metal is silvery and tarnishes black when exposed to air the bulk of.

cobalt atomic number

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