Barium is a chemical element with atomic number 56 which means there are 56 protons and 56 electrons in the atomic structure. The chemical symbol for Lead is Pb. The chemical symbol for Gallium is Ga. Gallium has similarities to the other metals of the group, aluminium, indium, and thallium. The nucleus consists of 27 protons (red) and 32 neutrons (blue). Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs). 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 The metal is used especially for heat-resistant and magnetic alloys. Chemically, sulfur reacts with all elements except for gold, platinum, iridium, tellurium, and the noble gases. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. The name samarium is after the mineral samarskite from which it was isolated. Atomic Number of Cobalt. Units of measure have been defined for mass and energy on the atomic scale to make measurements more convenient to express. Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure. Its extreme rarity in the Earth’s crust, comparable to that of platinum. Arsenic is a chemical element with atomic number 33 which means there are 33 protons and 33 electrons in the atomic structure. Arsenic is a metalloid. The chemical symbol for Hydrogen is H. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. 113Cd has specific absorption cross-section. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. The atomic mass is the mass of an atom. Pure radium is silvery-white alkaline earth metal.    Boiling Point It is used in many places today, such as, magnets materials, paint pigments, glasses, and even cancer therapy. Copper is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. Please use this form below to contact Atomic Aquatics. Ruthenium is a rare transition metal belonging to the platinum group of the periodic table. 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. Atomic number color: black=solid: Group 9 is a group (column) of chemical elements in the periodic table. The chemical symbol for Rubidium is Rb. Cobalt (Co) is a bluish-white metal that has the atomic number 27 in the periodic table. Discoverer: Davy, Sir H. and Thénard, L.-J. The chemical symbol for Selenium is Se. 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.    Alkali Metals Hydrogen (H, atomic number 1) has two stable isotopes: hydrogen-1 … The chemical symbol for Cadmium is Cd. Atomic Number of Cobalt is 27.. Chemical symbol for Cobalt is Co. The chemical symbol for Thulium is Tm. Gold is thought to have been produced in supernova nucleosynthesis, from the collision of neutron stars. It is a bluish-white, hard, lustrous and brittle metal. Silicon is a chemical element with atomic number 14 which means there are 14 protons and 14 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. The chemical symbol for Argon is Ar. Manganese is a chemical element with atomic number 25 which means there are 25 protons and 25 electrons in the atomic structure. Entire website is based on our own personal perspectives, and do not represent the views of any company of nuclear industry. Nickel belongs to the transition metals and is hard and ductile. 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. Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure. Carbon is one of the few elements known since antiquity. Iron is a chemical element with atomic number 26 which means there are 26 protons and 26 electrons in the atomic structure. All Rights Reserved. The first alloy used on a large scale was bronze, made of tin and copper, from as early as 3000 BC. The chemical symbol for Curium is Cm. The chemical symbol for Holmium is Ho. In nuclear industry, especially natural and artificial samarium 149 has an important impact on the operation of a nuclear reactor. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. The chemical symbol for Boron is B. Number of protons in Cobalt is 27. The chemical symbol for Arsenic is As. 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. Its boiling point is the lowest among all the elements. (See Appendix 6.) The most commonly used spontaneous fission neutron source is the radioactive isotope californium-252. Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. It is obtained chiefly from the mineral cassiterite, which contains tin dioxide. Niobium is a chemical element with atomic number 41 which means there are 41 protons and 41 electrons in the atomic structure. Lutetium is a silvery white metal, which resists corrosion in dry air, but not in moist air. It is a Transition metal and located in Group 9 of the periodic table. It is occasionally found in native form as elemental crystals. The chemical symbol for Iron is Fe. Naturally occurring potassium is composed of three isotopes, of which 40K is radioactive. Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 electrons in the atomic structure. Zirconium is a lustrous, grey-white, strong transition metal that resembles hafnium and, to a lesser extent, titanium. Since the density (ρ) of a substance is the total mass (m) of that substance divided by the total volume (V) occupied by that substance, it is obvious, the density of a substance strongly depends on its atomic mass and also on the atomic number density (N; atoms/cm3). 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. Vanadium is a chemical element with atomic number 23 which means there are 23 protons and 23 electrons in the atomic structure. Cobalt is widely used in batteries and in electroplating. Atomic mass of Cobalt is 58.9332 u.. The chemical symbol for Francium is Fr. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant. It occurs on Earth as the decay product of various heavier elements. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. The chemical symbol for Promethium is Pm. cobalt: (Co) [ ko´bawlt ] a chemical element, atomic number 27, atomic weight 58.933. Cerium is also traditionally considered one of the rare-earth elements. This page was created by Yinon Bentor. 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. Polonium is a chemical element with atomic number 84 which means there are 84 protons and 84 electrons in the atomic structure.    Rare Earth Elements, Basic Information | Atomic Structure | Isotopes | Related Links | Citing This Page. Europium is one of the least abundant elements in the universe. 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. Thorium is moderately hard, malleable, and has a high melting point. It has an estimated density of 40.7 x 103 kg/m3. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. A freshly exposed surface of pure copper has a reddish-orange color. The chemical symbol for Gadolinium is Gd. If you continue to use this site we will assume that you are happy with it. It is the heaviest essential mineral nutrient. The chemical symbol for Chlorine is Cl. The atomic number of cobalt is 27 and it is indicated by symbol is Co. Cobalt is a ferromagnetic. Mercury is commonly known as quicksilver and was formerly named hydrargyrum. Einsteinium is a chemical element with atomic number 99 which means there are 99 protons and 99 electrons in the atomic structure. 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. It is a soft, silvery-white alkali metal. 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. Caesium has physical and chemical properties similar to those of rubidium and potassium. George Brandt discovered cobalt in 1735. Ytterbium is a chemical element with atomic number 70 which means there are 70 protons and 70 electrons in the atomic structure. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. Niobium is a soft, grey, ductile transition metal, often found in the minerals pyrochlore (the main commercial source for niobium) and columbite. Holmium is a relatively soft and malleable silvery-white metal. Cobalt Element: Cobalt is a chemical element and it is a member of group 9 and period 4 in the periodic table. It has an atomic number of 27. Chemically, indium is similar to gallium and thallium. The chemical symbol for Silicon is Si.    Atomic Number Cobalt Co-60 is under investigation in clinical trial NCT02891083 (Adjuvant Therapies or Surgery Alone for High Risk pN0 Esophageal Cancer). Being a typical member of the lanthanide series, europium usually assumes the oxidation state +3. 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 Tin is Sn. Argon is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily unreactive substances become reactive; for example, an argon atmosphere is used in graphite electric furnaces to prevent the graphite from burning. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere and is often used with other rare gases in fluorescent lamps. cobalt 57 a radioisotope of cobalt, atomic mass 57, having a half-life of 270 days; used as a label for cyanocobalamin. Nuclides that have the same neutron number but a different proton number are called isotones. 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 Samarium is Sm. The chemical symbol for Niobium is Nb. Cerium is the second element in the lanthanide series. It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. The chemical symbol for Copper is Cu. Mendelevium is a metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities. Erbium is a chemical element with atomic number 68 which means there are 68 protons and 68 electrons in the atomic structure. It is a synthetic element (first synthesised at Hasse in Germany) and radioactive. Mass numbers of typical isotopes of Cobalt are 59. 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. The chemical symbol for Antimony is Sb. Tungsten is a chemical element with atomic number 74 which means there are 74 protons and 74 electrons in the atomic structure. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Thorium is commonly found in monazite sands (rare earth metals containing phosphate mineral). 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. The chemical symbol for Astatine is At. Oxygen is a colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air. Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. We can determine the neutron number of certain isotope. Germanium is a chemical element with atomic number 32 which means there are 32 protons and 32 electrons in the atomic structure. One atomic mass unit is equal to 1.66 x 10-24 grams. In nuclear reactors, promethium equilibrium exists in power operation. Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Göhring, Otto and Fajans, Kasimir. The densest material found on earth is the metal osmium, but its density pales by comparison to the densities of exotic astronomical objects such as white dwarf stars and neutron stars. Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 electrons in the atomic structure. The chemical symbol for Bismuth is Bi. Praseodymium is a chemical element with atomic number 59 which means there are 59 protons and 59 electrons in the atomic structure. Since nucleons (protons and neutrons) make up most of the mass of ordinary atoms, the density of normal matter tends to be limited by how closely we can pack these nucleons and depends on the internal atomic structure of a substance. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal. 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. Its abundance in rocky planets like Earth is due to its abundant production by fusion in high-mass stars. Under standard conditions, it is the lightest metal and the lightest solid element. Krypton is a member of group 18 (noble gases) elements. Atomic Number of Cobalt. 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.    Metalloids The chemical symbol for Lutetium is Lu.    Noble Gases According to the Einstein relationship (E=mc2), this binding energy is proportional to this mass difference and it is known as the mass defect. The chemical symbol for Lithium is Li. Cobalt is found in the Earth’s crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. 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 Tantalum is Ta. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. Tungsten is an intrinsically brittle and hard material, making it difficult to work. The chemical symbol for Neodymium is Nd. For example, the neutron number of uranium-238 is 238-92=146. Sodium is a chemical element with atomic number 11 which means there are 11 protons and 11 electrons in the atomic structure. Chlorine is a yellow-green gas at room temperature. The chemical symbol for Rhenium is Re. Copper is a chemical element with atomic number 29 which means there are 29 protons and 29 electrons in the atomic structure. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. The chemical symbol for Osmium is Os. is a rare earth element with a metallic silver luster. Radon is a radioactive, colorless, odorless, tasteless noble gas. Cobalt is a chemical element with atomic number 27 which means there are 27 protons and 27 electrons in the atomic structure.The chemical symbol for Cobalt is Co. Atomic Mass of Cobalt. It has the symbol Co. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). The chemical symbol for Radium is Ra. Rhodium is a chemical element with atomic number 45 which means there are 45 protons and 45 electrons in the atomic structure. Because of its closed-shell electron configuration, its density and melting and boiling points differ significantly from those of most other lanthanides. There is only one stable isotope of cobalt, which has an atomic weight of 59. The information contained in this website is for general information purposes only. Cadmium is a soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. The chemical symbol for Barium is Ba. It rarely occurs in its elemental state or as pure ore compounds in the Earth’s crust. 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. The chemical symbol for Actinium is Ac. The chemical symbol for Iridium is Ir. Nickel is a silvery-white lustrous metal with a slight golden tinge. Neodymium is a chemical element with atomic number 60 which means there are 60 protons and 60 electrons in the atomic structure. The chemical symbol for Scandium is Sc. 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 Europium is Eu. The chemical symbol for Fermium is Fm. Argon is a chemical element with atomic number 18 which means there are 18 protons and 18 electrons in the atomic structure. Areas covered include atomic structure, physical properties, atomic interaction, thermodynamics, identification, atomic size, crystal structure, history, abundances, and nomenclature.