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Cobalt | |
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State | Ontario |
Country | Canada |
Capital | |
Population | 1128 |
Cobalt is a chemical element with the symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth's crust only in 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, silver-gray metal.
Cobalt-based blue pigments (cobalt blue) have been used since ancient times for jewelry and paints, and to impart a distinctive blue tint to glass, but the color was later thought to be due to the known metal bismuth. Miners had long used the name kobold ore (German for goblin ore) for some of the blue-pigment-producing minerals; they were so named because they were poor in known metals, and gave poisonous arsenic-containing fumes when smelted. In 1735, such ores were found to be reducible to a new metal (the first discovered since ancient times), and this was ultimately named for the kobold.
Today, some cobalt is produced specifically from one of a number of metallic-lustered ores, such as cobaltite (CoAsS). The element is, however, more usually produced as a by-product of copper and nickel mining.
Bedford | |
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State | |
Country | |
Capital | |
Population | 0 |
Bedford is a historic market and the county town of Bedfordshire, England. At the 2011 Census, the population of the Bedford built-up area was 106,940. At the same census, the Borough of Bedford had a population of 157,479.Bedford was founded at a ford on the River Great Ouse, and is thought to have been the burial place of King Offa of Mercia, who is remembered for building Offa's Dyke on the Welsh border. Bedford Castle was built by Henry I, although it was destroyed in 1224.