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Extraction of metals and Alloys.
Member rating: No Rating | Words: | Submitted: Mon Mar 08 2004
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YEAR 11 CHEMISTRY Extraction of metals and Alloys What is an alloy? An alloy is a mixture of metals, which may have different and improved qualities from metal elements, which make it. The percentage of elements in an alloy can be tailored to the application or purpose it is being made for. Usually an alloy is made of one metal (the base metal) with small amounts of other metals added. The other metals replace the position of the base metal in its structure. Extraction of Metals An element or a compound in nature inside the earth's crust is called a mineral. They have a percentage of metal which can be extracted. This is called a metal ore. The most common metal ores are oxides and sulphides. Sulphides are the oldest ores. Oxides are formed when photosynthesis in plants release oxygen into the air. Metal ores are an infinite resource and once they are used, they...
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