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Metals and Non-metals
Define the following terms:
(i)- The elements or compounds, which occur naturally in the earth’s crust, are known as minerals.
(ii)- Ore is defined as the natural rock or mineral present in the Earth’s crust which contains one or more valuable metals, that are extracted commercially and economically.
(iii)- Gangue is defined as unwanted impurities like sand, limestone, mica, etc, that are present in an ore.
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