The sum of the number of protons and neutrons of an atomic nucleus. In other words, it''s the sum of the number of nucleons in an atom. The ratio of the average mass per atom of an isotope to 1/12 the mass of a carbon-12 atom. Relative atomic mass is also known as atomic weight (symbol: A r ). Cobalt (Co) has an atomic mass of 27.
Named from the German word meaning "goblin," cobalt is a shiny, brittle, bluish-gray metal. It is a hard, stable metal unaffected by air or water and only slowly affected by acid. Cobalt is one of the three ferromagnetic metals, so it is often used in alloys for magnets. When cobalt is alloyed with the other two ferromagnetic elements, iron ...
An overview of the nuclides as well as the isotopic data and properties are listed on the following page: Cobalt isotopes. Chemistry of Cobalt Oxidation states +2. +3 Electronegativity 1.8 (Pauling original) 1.88 (Pauling) 1.84 (Allen) 3.7305 eV (Gosh Gupta) 4.3 eV (Pearson) Electron affinity 0.662 26(5) eV 63.898(5) kJ mol -1
Its physical properties resemble iron and nickel. Cobalt is a ferromagnetic (strongest magnet), up to 1121 0 C. Its specific gravity is 8.9. Pure cobalt is obtained through smelting process, which is hard and lustrous and release vapors …
Learn about cobalt, a hard, brittle, magnetic metal with six oxidation states and many alloys. Find out its discovery, sources, uses, and trivia.
Another common method of categorization recognizes nine element families: Alkali Metals: Group 1 (IA) - one valence electron. Alkaline Earth Metals: Group 2 (IIA) - two valence electrons. Transition Metals: Groups 3-12 - two valence electrons. Boron Group or Earth Metals: Group 13 (IIIA) - three valence electrons.
The Element Cobalt in the Periodic Table. Cobalt has atomic symbol Co, and atomic number 27. It is a silver-grey transition metal that lies to the right of iron, to the left of nickel, and above rhodium in the periodic table. It shares some …
alkali metal, any of the six chemical elements that make up Group 1 (Ia) of the periodic table—namely, lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). The alkali metals are so called because reaction with water forms alkalies (i.e., strong bases capable of neutralizing acids).Sodium and potassium are the …
Group 9, by modern IUPAC numbering, is a group (column) of chemical elements in the d-block of the periodic table.Members of Group 9 include cobalt (Co), rhodium (Rh), iridium (Ir) and meitnerium (Mt). [page needed] These elements are among the rarest of the transition metals.Like other groups, the members of this family show patterns in electron …
Cobalt Properties Group. Cobalt Properties Group is a premier property management firm with offices in Bend, OR, and Seattle, WA managing both commercial and residential properties. Our experienced team is small …
Physical Properties. Cobalt is a sturdy, gray metal which resembles iron and nickel. Although cobalt is ductile it is also somewhat malleable. Ductile means the metals ability to be drawn into thin wires. Malleable means is the ability of being hammered into thin sheets. ... The common ores of cobalt include: cobaltite, smaltite, chloranthite ...
Diverse properties, intermediate between those of metals and nonmetals; Best-known member: carbon, which commonly forms 4 bonds; Nitrogen Group or Pnictogens. Like the boron family and carbon family, members of the nitrogen family or pnictogens display a range of properties. The family includes nonmetals, metalloids, …
Group 9: Transition Metals. Chemistry of Iridium. Page ID. Jim Clark. Truro School in Cornwall. Cobalt (Co) lies with the transition metals on the periodic table. The atomic number of Cobalt is 27 with an atomic mass of 58.933195. Cobalt was first discovered in 1735 by George Brandt in Stockholm Sweden. It is used in many places …
Physical properties of cobalt are mentioned below. Cobalt is a transition metal having bluish lustrous grey metallic surface. The melting point of cobalt is 1495 °C and its boiling point is 2927 °C. There are various synthetic isotopes of cobalt, but the most abundant naturally occurring stable isotope is the 59 Co.
1. Introduction. While cobalt-containing blue pigments have been found in ancient artifacts, the metal itself was not isolated until 1735 by the Swedish chemist, Brandt, as the first elemental metal discovered since ancient times, and it was only confirmed as an element in 1780 [1].However, despite this slow start, it is commonly held that the first …
The chemical elements can be broadly divided into metals, metalloids, and nonmetals according to their shared physical and chemical properties.All metals have a shiny appearance (at least when freshly polished); are good conductors of heat and electricity; form alloys with other metals; and have at least one basic oxide.Metalloids are metallic …
Cobalt metal: 7440-48-4: Co c: 58.9 c: gray hexagonal or cubic metal c: 8.92 c: 0. ... Appendix F. Substance Names and Common Synonyms; Appendix G. Listed Substances by CAS Number; Related information ... Physical and Chemical Properties of Cobalt Metal and Some Cobalt Compounds - 15th Report on Carcinogens. Your browsing activity is …
Annual world production is around 17,000 tons. Primary mining areas are in Zaire, Morocco, Sweden and Canada. Uses of Cobalt: Used in many hard alloys; for magnets, ceramics and special glasses. Also used in permanent magnets, razor blades and catalitic converters. Cobalt-60 is used in cancer therapy.
Overview. Humans have been using compounds of cobalt since at least 1400 B.C. The compounds were used to color glass and glazes blue. In 1735, Swedish chemist Georg Brandt (1694-1768) analyzed a dark blue …
Explore the multifaceted world of cobalt, a transition metal with a rich history and wide-ranging applications. Dive into its physical and chemical properties, discover its role in various industries like battery production, aerospace, and healthcare, and learn about its …
Cobalt (Co) Ore. Modified date: 23/04/2023. Cobalt (Co) is a chemical element with the atomic number 27 and an atomic mass of 58.93 g/mol. It is a hard, brittle, and silver-gray metal that belongs to the transition metals group in the periodic table. Cobalt has a high melting point, excellent magnetic properties, and is known for its blue color ...
The d orbitals fill with the copper family (group 11); for this reason, the next family (group 12) are technically not transition elements. However, the group 12 elements do display some of the same chemical properties and are commonly included in discussions of transition metals. ... is more common in the earth''s crust than silver (4.5 × 10 ...
Accelerating material discovery remains one of the greatest challenges in material research. Here, the authors introduce a method for discovering materials with specific magnetic properties. They demonstrate their approach by identifying several materials with room-temperature ferromagnetism, or with easy-axis magnetic anisotropy. …
Health effects that are a result of the uptake of high concentrations of cobalt are: - Vomiting and nausea. - Vision problems. - Heart problems. - Thyroid damage. Health effects may also be caused by radiation of radioactive cobalt isotopes. This can cause sterility, hair loss, vomiting, bleeding, diarrhoea, coma and even death.
Cobalt (Co) is a naturally occurring transition element with magnetic properties. It is the 33rd most abundant element and makes up approximately 0.0025% of the weight of Earth''s crust. Cobalt is a component of more than 70 naturally occurring minerals including arsenides, sulfides, and oxides. The only stable and naturally occurring cobalt isotope is …
Cobalt is a metallic chemical element found in group 9 of the periodic table of elements. The cobalt symbol on the periodic table is Co, and the cobalt atomic number is 27. Cobalt has an abundance ...
The magnetic properties of cobalt are even more obvious in alloys. An alloy is made by melting and mixing two or more metals. The mixture has properties different from those of the individual metals. The melting point …
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. Cobalt-60 has a half-life of 5.27 years and decays into nickel-60 through beta decay. Cobalt compounds have been used for centuries to color porcelain, glass, pottery, tile and enamel.
Properties, sources and uses of the element cobalt. Some common forms of cobalt include cobalt-60 and cobalt chloride. Cobalt blue is a vivid color used in artwork. ... Brandt''s family owned these ...
Cobalt Quartz, a crystal known for its distinctive properties, facilitates emotional healing, supports forgiveness, and radiates empathetic energy. It offers a sense of solace in managing conditions like PTSD, grief, anxiety, and depression, providing insightful pathways for transformative growth and fostering compassion.
OverviewCompoundsCharacteristicsIsotopesHistoryOccurrenceProductionExtraction
Common oxidation states of cobalt include +2 and +3, although compounds with oxidation states ranging from −3 to +5 are also known. A common oxidation state for simple compounds is +2 (cobalt(II)). These salts form the pink-colored metal aquo complex [Co(H 2O) 6] in water. Addition of chloride gives the intensely blue [CoCl 4] . In a borax bead flame test, cobalt shows deep blue in both oxidizing …
Properties. Cobalt is a ferromagnetic material, hard yet brittle. It has a high melting point and is hard-wearing at elevated temperatures. It has high strength and possesses good conduction properties. Below are some key properties of cobalt [1,2]: ... Cobalt steel is a variation of high-speed steel with common grades M-35 and M-42. It is an ...