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建立人际资源圈Nickel
2013-11-13 来源: 类别: 更多范文
Nickel
Nickel is a magnetic metallic element that is mainly used in making alloys. It is one of the transition elements of the periodic table. The atomic number of nickel is 28, the symbol is Ni, the atomic weight is 58.6934, it becomes a solid at 298 K, and it color is a lustrous, metallic, silvery tinge.
Nickel was used in coins in nickel-copper alloys for several thousand year, but it was not recognized as an element until 1751, when Baron Axel Frederic Cronstedt, a Swedish chemist, isolated the metal from niccolite ore.
Nickel is a hard, malleable, and ductile metal. It has magnetism below 345° C (653° F). Metallic nickel is not very active in chemical reactions. It melts at about 1,455° C (2,651° F) and boils at about 2,730° C (4,946° F).
Nickel is found as a metal in meteors. It is also found in minerals such as garnierite, millerite, niccolite, pentlandite, and pyrrhotite. Nickel is the 22nd most abundant in element found in rocks in the earths crust.
Nickel is used as a protective and ornamental coating for metals that are susceptible to corrosion. It is used mostly to form alloys. It adds strength
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