The Crossword Solver found answer to “Buffalo ___”, 6 letters crossword clue. The Crossword Solver finds answers to American-style crosswords, British-style crosswords, general knowledge crosswords and cryptic crossword puzzles.
Answer : NICKEL
Nickel (Ni), chemical element, ferromagnetic metal of Group 10 (VIIIb) of the periodic table, markedly resistant to oxidation and corrosion. Silvery white, tough, and harder than iron, nickel is widely familiar because of its use in coinage but is more important either as the pure metal or in the form of alloys for its many domestic and industrial applications. Elemental nickel very sparingly occurs together with iron in terrestrial and meteoric deposits.
The metal was isolated (1751) by a Swedish chemist and mineralogist, Baron Axel Fredrik Cronstedt, who prepared an impure sample from an ore containing niccolite (nickel arsenide). Earlier, an ore of this same type was called Kupfernickel after “Old Nick” and his mischievous gnomes because, though it resembled copper ore, it yielded a brittle, unfamiliar metal. Twice as abundant as copper, nickel constitutes about 0.007 percent of Earth’s crust; it is a fairly common constituent of igneous rocks, though singularly few deposits qualify in concentration, size, and accessibility for commercial interest.
The central regions of Earth are believed to contain considerable quantities. The most important sources are pentlandite, found with nickel-bearing pyrrhotite, of which certain varieties contain 3 to 5 percent nickel, and chalcopyrite, and nickel-bearing laterites, such as garnierite, a magnesium–nickel silicate of variable composition.
Nickel can be fabricated readily by the use of standard hot and cold working methods. Nickel reacts only slowly with fluorine, eventually developing a protective coating of the fluoride, and therefore is used as the pure metal or in the form of alloys such as Monel in equipment for handling fluorine gas and corrosive fluorides. Nickel is ferromagnetic at ordinary temperatures, although not as strongly as iron, and is less electropositive than iron but dissolves readily in dilute mineral acids.
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