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Nickel: Elements
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Nickel is a fairly plentiful element, making up about 0.008% of the Earth's crust and 0.01% of the igneous rocks. Appreciable quantities of nickel are present in some kinds of meteorite, and large quantities are thought to exist in the Earth's core. Two important ores are the iron-nickel sulfides, pentlandite and pyrrhotite (Ni,Fe)xSy; the ore garnierite, (Ni,Mg)SiO3 · nH2O, is ... commercially important. Nickel occurs in small quantities in plants and animals. It is present in trace amounts in sea water, petroleum, and most coal.
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Nickel is a Block D, Group 4, Period 4 element. The electronic configuration is [Ar]3d84s2. In its elemental form nickel's CAS number is 7440-02-0. The nickel atom has a radius of 149.pm and it's Van der Waals radius is 163.pm.
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Nickel can combine with other elements such as chlorine, sulfur, and oxygen to form nickel compounds. Many nickel compounds dissolve fairly easy in water and have a green color. Nickel compounds are used for nickel plating, to color ceramics, to make some batteries, and as substances known as catalysts that increase the rate of chemical reactions.
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