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About
Zinc is a chemical element; it has symbol Zn and atomic number 30. It is a slightly brittle metal at room temperature and has a shiny blue whitish appearance when surface oxidation is removed. It is the first element in group 12 (IIB) of the periodic table. Zinc is the 24th most abundant element in Earth's crust, with an average concentration of 70 grams per ton. Zinc also has five stable isotopes; the most abundant of which, Zn-64, comprises nearly half of zinc's total abundance. In some respects, zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size. The most common zinc ore is sphalerite (zinc blende), a zinc sulfide mineral. The largest concentration of economically feasible lodes in descending order are located in China, Peru, and Australia, among others. Zinc is refined industrially by froth flotation of the ore, roasting, and final extraction using electricity (electrowinning).
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