Gold is a chemical element with symbol Au (from Latin: aurum) and atomic number 79. In its purest form, it is a bright, slightly reddish yellow, dense, soft ...
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Bismuth is a chemical element with symbol Bi and atomic number 83. Bismuth, a pentavalent post-transition metal and one of the pnictogens, chemically resembles its ...
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GENERAL PROFILE. This chapter presents a series of short discussions of many metals. It contains a tabulation of major health effects, physical properties and ...
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There are various methods used to purify or refine gold and they can be categorized into three: through the use of acid, use of fire, and use of electricity. These methods, however, vary in terms of complexity of the process, level of purification, and the costs involved.
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