It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 electrons in the atomic structure. If you want to get in touch with us, please do not hesitate to contact us via e-mail: Discoverer: Ramsey, Sir William and Cleve, Per Teodor. We assume no responsibility for consequences which may arise from the use of information from this website. The chemical symbol for Hafnium is Hf. The chemical symbol for Rubidium is Rb. Oxygen is a colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. Cobalt is widely present on the earth crust, in combination with other minerals and in natural water. Curium is a hard, dense, silvery metal with a relatively high melting point and boiling point for an actinide. (1969), Discoverer: Scientists at Dubna, Russia (1967)/Lawrence Berkeley Laboratory (1970), Discoverer: Armbruster, Paula and Muenzenberg, Dr. Gottfried, Element Category: unknown, probably a transition metal, Discoverer: David Anderson, Ruhani Rabin, Team Updraft, Element Category: unknown, probably a post-transition metal, Discoverer: Hisinger, Wilhelm and Berzelius, Jöns Jacob/Klaproth, Martin Heinrich. Cobalt Co-60 is under investigation in clinical trial NCT02891083 (Adjuvant Therapies or Surgery Alone for High Risk pN0 Esophageal Cancer). Gadolinium belongs to a rare earth elements (it is one of a set of seventeen chemical elements in the periodic table). The chemical symbol for Vanadium is V. Vanadium is a hard, silvery grey, ductile, and malleable transition metal. 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. The Cookies Statement is part of our Privacy Policy. Discoverer: Davy, Sir H. and Thénard, L.-J. Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, including rapid oxidation in air. The chemical symbol for Argon is Ar. Krypton is a member of group 18 (noble gases) elements. The chemical properties of this silvery gray, crystalline transition metal are intermediate between rhenium and manganese. Cobalt is a naturally-occurring element that has properties similar to those of iron and nickel. 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. Cobalt (Co) is a bluish-white metal that has the atomic number 27 in the periodic table. The chemical symbol for Indium is In. The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. The total number of neutrons in the nucleus of an atom is called the neutron number of the atom and is given the symbol N. Neutron number plus atomic number equals atomic mass number: N+Z=A. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. 113Cd has specific absorption cross-section. 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 chemical symbol for Praseodymium is Pr. The chemical symbol for Gallium is Ga. Gallium has similarities to the other metals of the group, aluminium, indium, and thallium. Thallium is a soft gray post-transition metal is not found free in nature. Sodium is a soft, silvery-white, highly reactive metal. Niobium is a soft, grey, ductile transition metal, often found in the minerals pyrochlore (the main commercial source for niobium) and columbite. Mass numbers of typical isotopes of Cobalt are 59. The atomic mass or relative isotopic mass refers to the mass of a single particle, and therefore is tied to a certain specific isotope of an element. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. Francium is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine). cobalt 57 a radioisotope of cobalt, atomic mass 57, having a half-life of 270 days; used as a label for cyanocobalamin. It is occasionally found in native form as elemental crystals. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. The atomic number of Cobalt is 27 with an atomic mass of 58.933195. Molybdenum is a chemical element with atomic number 42 which means there are 42 protons and 42 electrons in the atomic structure. A freshly exposed surface of pure copper has a reddish-orange color. The chemical symbol for Plutonium is Pu. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl. It is a lanthanide, a rare earth element, originally found in the gadolinite mine in Ytterby in Sweden. The difference is a measure of the nuclear binding energy which holds the nucleus together. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. Atomic structure of Cobalt includes atomic number, atomic weight, electron configuration Chromium is a chemical element with atomic number 24 which means there are 24 protons and 24 electrons in the atomic structure.    Name It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. Cobalt is widely used in batteries and in electroplating.    Number of Neutrons Europium is a chemical element with atomic number 63 which means there are 63 protons and 63 electrons in the atomic structure. 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. Aluminium is a silvery-white, soft, nonmagnetic, ductile metal in the boron group. Gadolinium is a chemical element with atomic number 64 which means there are 64 protons and 64 electrons in the atomic structure. Nickel is a chemical element with atomic number 28 which means there are 28 protons and 28 electrons in the atomic structure. The atomic mass is the mass of an atom. See also: Atomic Mass Number – Does it conserve in a nuclear reaction?    Electron Configuration Titanium is a chemical element with atomic number 22 which means there are 22 protons and 22 electrons in the atomic structure. Atomic Number of Cobalt is 27.. Chemical symbol for Cobalt is Co. Calcium is a chemical element with atomic number 20 which means there are 20 protons and 20 electrons in the atomic structure. It is the fifth most abundant element in Earth’s crust and the third most abundant metal, after iron and aluminium. Praseodymium is the third member of the lanthanide series and is traditionally considered to be one of the rare-earth metals. Its properties are thus intermediate between those of chlorine and iodine. The chemical symbol for Radon is Rn. Major advantage of lead shield is in its compactness due to its higher density. 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). Cobalt-60, a radioactive isotope of cobalt, is an important source of gamma rays and is used to treat some forms of cancer and as a medical tracer. Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. 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. Boron is a chemical element with atomic number 5 which means there are 5 protons and 5 electrons in the atomic structure. The chemical symbol for Lithium is Li. Polonium is a chemical element with atomic number 84 which means there are 84 protons and 84 electrons in the atomic structure. Each entry has a full citation identifying its source. Tin is a chemical element with atomic number 50 which means there are 50 protons and 50 electrons in the atomic structure. Germanium is a chemical element with atomic number 32 which means there are 32 protons and 32 electrons in the atomic structure. The chemical symbol for Francium is Fr. 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. cobalt: (Co) [ ko´bawlt ] a chemical element, atomic number 27, atomic weight 58.933. The information contained in this website is for general information purposes only. Thorium is commonly found in monazite sands (rare earth metals containing phosphate mineral). Cerium is a chemical element with atomic number 58 which means there are 58 protons and 58 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. It is even less abundant than the so-called rare earths. Mercury is a heavy, silvery d-block element, mercury is the only metallic element that is liquid at standard conditions for temperature and pressure. We are committed to providing the highest level of customer service. Tungsten is an intrinsically brittle and hard material, making it difficult to work. Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 electrons in the atomic structure. Atomic mass of Cobalt is 58.9332 u.. Very soft and malleable, indium has a melting point higher than sodium and gallium, but lower than lithium and tin. Only about 5×10−8% of all matter in the universe is europium. Cerium is the second element in the lanthanide series. The chemical symbol for Gadolinium is Gd. It occurs on Earth as the decay product of various heavier elements. al. Cobalt Element: Cobalt is a chemical element and it is a member of group 9 and period 4 in the periodic table. The chemical symbol for Neon is Ne. 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 Radium is Ra. In nuclear industry boron is commonly used as a neutron absorber due to the high neutron cross-section of isotope 10B. The chemical symbol for Krypton is Kr. The chemical symbol for Germanium is Ge. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air. The chemical symbol for Titanium is Ti.    Noble Gases is a rare earth element with a metallic silver luster. Lead is a heavy metal that is denser than most common materials. Nearly all technetium is produced synthetically, and only minute amounts are found in the Earth’s crust. Under standard conditions, it is the lightest metal and the lightest solid element. 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. A relatively large percentage of the world’s production goes into magnetic alloys such as the Alnicos for permanent magnets. The chemical symbol for Boron is B. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. It rarely occurs in its elemental state or as pure ore compounds in the Earth’s crust. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. The chemical symbol for Uranium is U. Xenon is a colorless, dense, odorless noble gas found in the Earth’s atmosphere in trace amounts. It has an estimated density of 40.7 x 103 kg/m3. Praseodymium is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. The chemical symbol for Technetium is Tc. Scandium is a chemical element with atomic number 21 which means there are 21 protons and 21 electrons in the atomic structure. Vanadium is a chemical element with atomic number 23 which means there are 23 protons and 23 electrons in the atomic structure. About This Site There is only one stable isotope of cobalt, which has an atomic weight of 59. Mendelevium is a chemical element with atomic number 101 which means there are 101 protons and 101 electrons in the atomic structure. The chemical symbol for Zinc is Zn. The chemical symbol for Copper is Cu. Calcium is an alkaline earth metal, it is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. Atomic number color: black=solid: Group 9 is a group (column) of chemical elements in the periodic table. The chemical symbol for Manganese is Mn. (See Appendix 6.) Platinum is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Number of protons in Cobalt is 27. The chemical symbol for Ytterbium is Yb. The chemical symbol for Iron is Fe. © 2019 periodic-table.org / see also Indium is a chemical element with atomic number 49 which means there are 49 protons and 49 electrons in the atomic structure. Pure germanium is a semiconductor with an appearance similar to elemental silicon. Nickel belongs to the transition metals and is hard and ductile. 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. The chemical symbol for Calcium is Ca. Manganese is a chemical element with atomic number 25 which means there are 25 protons and 25 electrons in the atomic structure. The chemical symbol for Americium is Am. The chemical symbol for Neptunium is Np. Hafnium is a chemical element with atomic number 72 which means there are 72 protons and 72 electrons in the atomic structure. To access our product user manuals, follow the links below. Uranium has the highest atomic weight of the primordially occurring elements. If you continue to use this site we will assume that you are happy with it. 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. Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. 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. 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. The chemical symbol for Sulfur is S. Sulfur is abundant, multivalent, and nonmetallic. The chemical symbol for Neodymium is Nd. The chemical symbol for Thallium is Tl. Because of its high chemical reactivity, barium is never found in nature as a free element. Silver is a chemical element with atomic number 47 which means there are 47 protons and 47 electrons in the atomic structure. Therefore, we cannot determine the neutron number of uranium, for example. Each nuclide is denoted by chemical symbol of the element (this specifies Z) with tha atomic mass number as supescript. Like the other metals of the platinum group, ruthenium is inert to most other chemicals. These elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare earth elements. Samarium is a chemical element with atomic number 62 which means there are 62 protons and 62 electrons in the atomic structure. The chemical symbol for Tantalum is Ta. Thorium metal is silvery and tarnishes black when exposed to air, forming the dioxide. In nuclear industry cadmium is commonly used as a thermal neutron absorber due to very high neutron absorption cross-section of 113Cd. Radon is a radioactive, colorless, odorless, tasteless noble gas. Our highly trained team of Customer Care Representatives are available to help answer any questions, assist with your orders and troubleshoot for you. The absorption of a neutron converts cobalt-59 to radioactive cobalt-60 (half-life 5.272 years), which decays by the emission of a beta particle and a high-energy gamma ray to nickel-60. Americium is a transuranic member of the actinide series, in the periodic table located under the lanthanide element europium, and thus by analogy was named after the Americas. [page needed] These are all transition metals in the d-block. The chemical symbol for Lutetium is Lu. 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. Occurs on Earth as the rare earths gallium has similarities to the densities of astronomical. Weight 58.933 entry has a half-life of 270 days ; used as cobalt atomic number neutron absorber to... 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