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Bronze Age
(Encyclopedia) Bronze Age, period in the development of technology when metals were first used regularly in the manufacture of tools and weapons. Pure copper and bronze, an alloy of copper and tin,…nickel
(Encyclopedia) nickel, metallic chemical element; symbol Ni; at. no. 28; at. wt. 58.6934; m.p. about 1,453℃; b.p. about 2,732℃; sp. gr. 8.902 at 25℃; valence 0, +1, +2, +3, or +4. Nickel is a hard,…Carteret
(Encyclopedia) Carteret, borough (2020 pop. 25,326), Middlesex co., NE N.J., on Arthur Kill, opposite Staten Island; inc. 1906. It has oil and copper…Bordeaux mixture
(Encyclopedia) Bordeaux mixtureBordeaux mixturebôrdōˈ [key], fungicide consisting of cupric sulfate and lime in water. Its fungicidal activity is associated with the slow formation of copper…Bisbee
(Encyclopedia) Bisbee Bisbee bĭzˈbē [key], city (2020 pop. 4,923), seat of Cochise co., SE Ariz., near the…Copperbelt
(Encyclopedia) Copperbelt, mining region, N central Zambia, central Africa. A natural extension of the mineral-rich region of SE Congo, the Copperbelt is one of the richest sources of copper in the…Lubumbashi
(Encyclopedia) LubumbashiLubumbashil&oomacr;b&oomacr;mbäˈshē [key], city (1984 pop. 564,830), capital of Haut-Katanga province, SE Congo (Kinshasa), near the border with Zambia. The second…bronze, in metallurgy
(Encyclopedia) bronze, in metallurgy, alloy of copper, tin, zinc, phosphorus, and sometimes small amounts of other elements. Bronzes are harder than brasses. Most are produced by melting the copper…Sudbury, city, Canada
(Encyclopedia) Sudbury, city (1991 pop. 92,884), central Ont., Canada. It is the center of Canada's largest mining region, which produces much of the world's nickel and large quantities of copper,…metal
(Encyclopedia) metal, chemical element displaying certain properties by which it is normally distinguished from a nonmetal, notably its metallic luster, the capacity to lose electrons and form a…Trending
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