Cobalt is a chemical element; it has symbol Co and atomic number 27. As with nickel, cobalt is found in the Earth's crust only in a chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, somewhat brittle, gray metal.

Mar 19, 2025 · Cobalt, metallic chemical element, one of the transition elements, atomic number 27. The metal is used especially for heat-resistant and magnetic alloys. A relatively large percentage of the world’s production goes into magnetic alloys …

Cobalt is transition metal and was discovered in pure form in 1735. It is essential part of vitamin B 12. Its compounds are known as cobalt blue used to color pottery and glass. History and Discovery. Cobalt has been used as a coloring agent since Bronze Age. It has been found in Egyptian statuettes and in Persian jewelry of the 3 rd millennium ...

Aug 17, 2021 · Cobalt has a melting point of 1495°C, boiling point of 2870°C, specific gravity of 8.9 (20°C), with a valence of 2 or 3. Cobalt is a hard, brittle metal. It is similar in appearance to iron and nickel. Cobalt has a magnetic permeability around 2/3 that of iron. Cobalt is found as a mixture of two allotropes over a wide temperature range.

Feb 5, 2015 · 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.

Cobalt (pronunciation: KO-bolt) is a hard, lustrous silvery-blue element belonging to the group of transition metals, and it is represented by the chemical symbol Co [1, 2, 3]. It is chemically active and can form many compounds [4].

Cobalt is a chemical element with symbol Co and atomic number 27. Classified as a transition metal, Cobalt is a solid at room temperature. J.C. Slater, J Chem Phys, 1964, 41 (10), 3199-3205. DOI:10.1063/1.1725697.

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.

- Cobalt is a hard, metallic element symbolized as Co with an atomic number of 27. - This transition metal is crucial for various applications, such as rechargeable batteries, superalloys, and pigments. - As a metal, it is solid at room temperature, silvery-blue in …

Dec 19, 2017 · Cobalt is a silvery gray metal that has diverse uses based on certain key properties, including ferromagnetism, hardness and wear-resistance when alloyed with other metals, low thermal and electrical conductivity, high melting point, multiple valences, and production of intense blue colors when combined with silica.