Quito | |
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State | |
Country | |
Capital | |
Population | 0 |
Quito (; Spanish pronunciation: [ˈkito] (listen); Quechua: Kitu; formally Saint Francis of Quito) is the capital of Ecuador, the country's most populous city and at an elevation of 2,850 metres (9,350 ft) above sea level, it is the second highest official capital city in the world, and the closest to the equator. It is located in the Guayllabamba river basin, on the eastern slopes of Pichincha, an active stratovolcano in the Andes Mountains.
In 2008, the city was designated as the headquarters of the Union of South American Nations.The historic centre of Quito is one of the largest, least-altered and best-preserved in the Americas.
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.
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