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    WebElements Periodic Table » Copper » the essentials. Copper appears in the periodic table at the top of Group 11 above silver and gold. Collectively these are sometimes referred to as the coinage metals, although in modern times these metals are used less frequently than in the past. Copper: The mineralogy of Copper - Mindat.org

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    Group 3 is a group of elements in the periodic table.This group, like other d-block groups, should contain four elements, but it is not agreed what elements belong in the group. Scandium (Sc) and yttrium (Y) are always included, but the other two spaces are usually occupied by lanthanum (La) and actinium (Ac), or by lutetium (Lu) and lawrencium (Lr); less frequently, it is considered the group ...

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    Apr 08, 2010· Beyond that, cobalt compounds have been used for centuries to color porcelain, glass, pottery, tile and enamel. Some of these compounds are known as: cobalt blue, ceruleum, new blue, smalt, cobalt yellow and cobalt green. It's very important as a trace element in our human nutrition as it is an essential part of vitamin B12.

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  • Cobalt(II) bromide - Wikipedia

    Cobalt(II) bromide can be prepared as a hydrate by the reaction of cobalt hydroxide with hydrobromic acid: Co(OH) 2 (s) + 2HBr(aq) → CoBr 2.6H 2 O(aq) Anhydrous cobalt(II) bromide may be prepared through the direct reaction of elemental cobalt and liquid bromine.

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    Cobalt is an essential trace element, and forms part of the active site of vitamin B12. The amount we need is very small, and the body contains only about 1 milligram. Cobalt salts can be given to certain animals in small doses to correct mineral deficiencies. In large doses cobalt is carcinogenic.

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  • The Element Cobalt -- Cobalt Atom - World of Molecules

    Use in medicine. Cobalt-60 (Co-60 or 60 Co) is a radioactive metal that is used in radiotherapy. It produces two gamma rays with energies of 1.17 MeV and 1.33 MeV. The 60 Co source is about 2cm in diameter and as a result produces a geometric penumbra, making the edge of the radiation field fuzzy.

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  • Cobalt(II) bromide - Wikipedia

    Cobalt(II) bromide (CoBr 2) is an inorganic compound. In its anhydrous form, it is a green solid that is soluble in water, used primarily as a catalyst in some processes. Properties. When anhydrous, cobalt(II) bromide appears as green crystals, while the hexahydrate appears as red-purple crystals. The hexahydrate loses four waters of ...

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  • WebElements Periodic Table » Cobalt » the essentials

    Cobalt compounds are important catalysts in a number of industrial processes. Cobalt is required in small amounts for life and is the only metal found in vitamins (cobalt is the critical component of vitamin B 12. 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 equivalent ...

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    Cobalt occurs naturally as only one stable isotope, cobalt-59. Cobalt-60 is a commercially important radioisotope, used as a radioactive tracer and for the production of high energy gamma rays. Cobalt is the active center of a group of coenzymes called cobalamins. Vitamin B 12, the best-known example of the type, is an essential vitamin for all ...

  • WebElements Periodic Table » Samarium » the essentials

    Samarium atoms have 62 electrons and the shell structure is The ground state electronic configuration of neutral samarium is [Xe].4f 6.6s 2 and the term symbol of samarium is 7 F 0. Samarium: description Your user agent does not support the HTML5 Audio element.

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  • Cobalt - Periodic Table of Elements and Chemistry

    Cobalt is widely used in batteries and in electroplating. Cobalt salts are used to impart blue and green colors in glass and ceramics. Radioactive 60 Co is used in the treatment of cancer. Cobalt is essential to many living creatures and is a component of vitamin B 12. Cobalt is also used in samarium-cobalt permanent magnets.

  • Bromure de cobalt(II) — Wikipédia

    Le bromure de cobalt(II) peut-être obtenu sous forme hydratée en faisant réagir de l'acide bromhydrique sur de l'hydroxyde de cobalt(II) : Co(OH) 2 (s) + 2HBr(aq) → CoBr 2.6H 2 O(aq) Le bromure de cobalt(II) anhydre est obtenu par réaction entre le cobalt métallique et le dibrome [4], [5], [6].

  • The Photographic Periodic Table of the Elements

    The definitive online periodic table reference site including technical data, and photographs and descriptions of thousands of samples of the chemical elements.

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  • cobalt | Definition & Facts | Britannica.com

    Cobalt (Co), chemical element, ferromagnetic metal of Group 9 (VIIIb) of the periodic table, used especially for heat-resistant and magnetic alloys. The metal was isolated ( c. 1735) by Swedish chemist Georg Brandt, though cobalt compounds had been used for centuries to impart a …