cobalt
An Internet Hotlist on Cobalt
created by morganbae
Stoneleigh-Burnham
Introduction
| Periodic table of element
| Compounds and uses
| Health, Environment, and food sources
| Characteristics, and appearance
| History
| Medicine and manufacturing
Introduction
Image from http:www.webelements.com/webelements/elements/media/element-pics/Co.jpg
- atomic number: 27, atomic mass: 58.9332amu, number of Neutrons: 32, melting point: 1495.0 degree, and Boiling point: 2870.0 degree.
- The element Cobalt is hard, silver or gray metal, lustrous, brittle element that seems much similar as iron and nickel. It is moderately flexible, and is ductile. It is capable of being drawn into thin wires.
- Cobalt is a reactive element. It reacts with most acids to provide hydrogen gas. It also amalgamates with oxyen in the air. However, it doesn't burn unless it is in a powder form. If cobalt dust contacts with strong oxidizers may cause fire and explosions. Cobalt reacts roughly and explosively with fused ammonium nitrate.
- Cobalt and its salts are relatively non toxic by ingestion. Most cases of cobalt toxicity relate to occupational skin contact or inhalation.
- Cobalt is used widely as an alloying ingredient together with nickel, chromium, and other elements. These alloys are used in jet aircraft, gas turbines and other equipment operating at high temperatures. Cobalt oxide is used in the glass and ceramic industries.
- Cobalt is not found in pure state in nature, but it often occurs with nickel, copper, or iron. Most cobalt is obtained as a byproduct in smelting nickel or copper ores. A variety of metal manufacturing processes are used to recover the cobalt, depending on the type of ore.
- Cobalt was discovered by Georg Brandt, a Swedish chemist, in 1739. He was attempting to prove that the ability of certain minerals to color glass blue was due to an unknown element and not to bismuth, as was commonly believed at the time.
- Cobalt is interesting that it is similar in appearance to iron and nickel. It has yet to be found in nature, but is being grown in laboratories and cobalt produces a spectacular blue color.
The Internet Resources
- Periodic Table of Elements: Cobalt - This page provides the information of the chemical element Cobalt, including Cobalt's name in other languages, atomic structure of Cobalt, chemical properties of Cobalt, Physical Properties of Cobalt, health, and the discovery of cobalt. In Cobalt's name in other languages, Latin -> Cobaltum, Czech -> Kobalt, French -> Cobalt, Italian -> Cobalto, Norwegian -> Kobolt, Portuguese -> Cobalto, Spanish -> Cobalto, Swedish -> Kobolt. Cobalt's number of electrons is 27, number of neutrons is 32, and number of protons 27. In 1735, George Brandt discovered cobalt in Stockholm Sweden. Cobalt used in many hard alloys, for magnets, ceramics and special glasses.
Periodic table of element
- Chemistry:Periodic table:cobalt:uses - This website gives an idea of the uses for cobalt. First, cobalt can be used with iron, nickel and other metals to make Alnico, an alloy of unusual magnetic strength with many important uses (jet engines and gas turbine engines). It also can be used in magnet steels and stainless steels, and in electroplating because of its appearance, hardness, and resistance to oxidation. The compounds are used as paint pigments.
- Cobalt Facts-Periodic Table of the Elements - This website explains about the general information, including isotopes, properties, and uses of cobalt. Twenty six isotopes of cobalt have been identified. Cobalt’s melting point is at 1495°C, boiling point is at 2870°C and is a hard fragile metal. The appearance is similar to iron and nickel. Cobalt forms many useful alloys. It is commonly associated with ores of iron,nickel, silver, lead and copper. It is essential for nutrition in many animals. Cobalt-59 is stable, and Cobalt-48, cobalt-49, and cobalt-51 are no radioactive.
- Cobalt: Encyclopedia of earth - This page produces the background, sources, and uses of cobalt. Cobalt is a gray, shiny, fragile metallic element. The atomic number is 27 and its symobol is Co. It belongs to the transition metals. In 1735, the Swedish scientist Georg Brandt found the cobalt. There are about 1 million tons of cobalt in the United States. Cobalt creates beautiful deep blue glass, and ceramics. It alloys with other metals, very strong magnets are created.
- Periodic table of element - This website has the information about Cobalt’s history, properties, uses, and description. For example, Cobalt has a melting point of 1495°C, boiling point of 2870°C. Cobalt is hard, weak metal, and is similar in appearance to iron and nickel. Cobalt also forms many useful metals, such as iron, and nickel, etc. It also has the fact about health effects, environmental effects of cobalt. For example, Humans add cobalt by releasing small amounts into the feeling from coal combustion and mining, processing of cobalt-containing the production and use of cobalt chemicals. In addition, it explains about basic features about Cobalt easily.
- Visual element - This website includes the origin name of Cobalt, image, and description. Cobalt was founded by the German, and the name is derived from ‘Kobald’, meaning goblin. Cobalt is a glossy, silvery metal with a blue shine. It can be magnetized like iron, and makes magnets in ceramics and paints. Cobalt is also part of vitamin B12, so humans need cobalt, and the body contains only about 1 milligram.
Compounds and uses
- Compounds and Uses - This website has the compounds, and uses of cobalt.There are 14 compounds of cobalt. CoF2 (Cobalt II fluoride), CoF3 (Cobalt III fluoride), CoF4 (Cobalt IV fluoride), CoCl2.6H2O (Cobalt II chloride 6-water) CoCl3 (Cobalt III chloride), CoBr2 (Cobalt II bromide), CoI2 (Cobalt II iodide), CoO (Cobalt II oxide), Co3O4 (Cobalt II, III oxide), CoS (Cobalt II sulphide), Co2S3 (Cobalt II sulphide), CoTe (Cobalt II telluride), are the compounds of cobalt. Cobalt is used in electroplating, which is the process in which something is coated by a thin metal through electrolysis. It is also used in alloys that make things such as jet engines, magnetic steels, and some stainless steels. It is essential to a part of vitamin B12, and is therefore an important part of human nutrition. The metal power of cobalt is a firehazard. Also the compounds of cobalt are toxic.
- Principal Metals-Cobalt - This website has the basic common facts about cobalt, properties, uses, and costs. Cobalt, the atomic number of 27, atomic symbol of Co, and atomic weight of 58.9332. Cobalt is weak, hard metal, resembling iron and nickel in appearance. It tends to exist as a mixture of two allotropes over a wide temperature range. Cobalt is also used in other magnetic steels and stainless steels, and in alloys used in jet turbines, because of its appearance, hardness, and resistance to oxidation. It carefully used in the form of the chloride, sulfate, acetate, or nitrate. Single compact sources of Cobalt-60 vary from about $1 to $10 curie.
Health, Environment, and food sources
- Cobalt(Co)-Chemical properties, Health and Environment effects - The description: there are chemical properties, health effects, and environmental effects of cobalt. The atomic number 27 of cobalt is hard silver-white metal, and glossy. It is similar to iron and nickel in physical properties. The Democratic Republic of the Congo, mainland China, Zambia, Russia and Australia are the main producers of cobalt. Cobalt is also found in Finland, and Kazakhstan. Cobalt is helpful for humans and animals because it is part of vitamin B12. Even though it is useful, if you take cobalt too much, it may damage your health, which are hair loss, vomiting, bleeding and even death.
Characteristics, and appearance
- Chemistry:Periodic Table:cobalt:key information - This website provides the details of the essentials, and description of cobalt. The Cobalt's symbol is 'Co', atomic number is 27, atomic weight is 58.933195, group number is 9, and period number is 4. It is lustrous, metallic, and it is available in many forms including foil, pieces, powder, rod, and wire. People all take a source of vitamin B12, which is a compound containing cobalt. It is a fragile, hard, transition metal with magnetic perioerties. You can find it in Zaire, Morocco and Canada. Cobalt salts color is a beautiful deep blue color.
- Cobalt-wikipedia - This website tells the characteristics, history, biological role, and occurrence of Cobalt. It is silver or gray metal. Small amounts of cobalt are found in most rocks, soil, water plants, and animals. The atomic number is 27, and it associates with nickel, and both meteoric iron. Humans and animals need small amounts of cobalt, which is the vitamin B12. Cobalt has been discovered in Egyptian sculpture from the third millennium BC. Swedish chemist George Brandt showed that cobalt was the source of blue color in glass. Cobalt is hard, shiny, and silver-gray metal. The cobalt compounds are used in the production of inks, paints, and varnishes.
- Native Cobalt (Co) - This website explains the overview, and physical characteristics of cobalt. Cobalt has not yet found in nature, but used in many applications. It looks like a natural stone, and has many industrial uses especially in dyes and in magnets. Cobalt provides a beautiful blue color that is used in glass and ceramics. When it alloys with iron and nickel, it gives a strong magnet. It also uses in airplan parts and engines. The color is steel gray, is metallic, gravity is 8.9, and magnetic.
- cobal, chemical element - This website explains the common things of cobalt. Cobalt’s symbol is Co, atomic number is 27, and is a silver-white metal. It is a member of Group 9 of the periodic table. This element forms many compounds chemically. Cobalt's yellow, green, and blue colors are high qualities that contain cobalt, and these colors are often used for coloring glass and ceramics. Pure cobalt metal is prepared by reduction of its compounds by aluminum, by carbon, or by hydrogen.
History
- It's element-element cobalt - This website describes the general facts, common things of cobalt, and history and uses. Cobalt is the solid metal, which atomic number is 27, and atomic weight is 58.933. The melting point is 1768K, and the boiling point is 2300K. The density is 8.86 g/cm³ and the period number and group number are 4 and 9. Cobalt was founded by a Swedish chemist, Georg Brandt in 1739. He proved that the skill of certain minerals to color glass blue was due to an unknown element. It usually refines nickel, silver, lead, copper and iron.
Medicine and manufacturing
- Cobalt medical Benefit, Deficiency, Food Sources and Supplements - This website explains the vitamins and cobalt food and Supplements. Cobalt can be found widely in the environment. Cobalt is a hard fragile silver-white element. People need cobalt for their manufacture of red blood cells, and preventing anemia. Good food sources of cobalt include fish, nuts, green vegetables, and cereals. Cobalt is an important part of the vitamin, so it is integral to many living organisms, including humans, plants, and animals. Having high amounts of cobalt could hurt the living organisms. An extremely high amounts of cobalt may damage the heart muscles, and red blood cells.
- Uses of Cobalt in Medicine and Industrial Manufacturing - This website the common descriptions and uses of cobalt in industrial, and uses in the body and medicine of cobalt. Cobalt is a hard silvery metal, and is harden than iron, and products nickel or copper ores. Cobalt is used in making jet engine and gas turbine parts, some compounds of cobalt are used as driers, substances that promote drying in paints. Cobalt is essential in small amount for proper nutrition. This element is a part of Vitamin B12.
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Content by morganbae, mbae@sbschool.org
http://www.kn.att.com/wired/fil/pages/listcobaltmo.html
Last revised Sun Dec 16 17:37:04 US/Pacific 2007
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