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Why has phytomining been used to produce gold nickel and copper but is only rarely used to produce zinc and lead?
Wiki User
∙ 11y ago
this question came up in the AQA chemistry text book and in some exam style questions. so the answer is:
Phytomining is used to produce gold nickel and copper because they are found in low grade ores the main reason is that gold, nickel and copper are below carbon in the reactivity series which means they are found in native state. (sometimes copper can be found in low grade ores) but phytomining is used rarely to produce zinc and lead is because they are more reactive than gold nickel and copper. this is why phytomining been used to produce gold nickel and copper but is only rarely used to produce zinc and lead.
Wiki User
∙ 11y ago
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What metal is the coin make from?
It varies in coins, in the U.S. we use copper for pennies, nickel for nickels,dimes, quarters and half-dollars. The reason why is because the cheapness of getting the metal, and so on and so forth.CorrectionThe US Mint lists specifications for all current US coins: 1¢ : copper-plated zinc, 97.5% zinc and 2.5% copper5¢ : 25% nickel and 75% copper10/25/50¢ : outer layers of 25% nickel and 75% copper bonded to a pure copper core$1 : outer layers of manganese-brass bonded to a pure copper core
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What colors does gold come in?
Gold is a colour in itself. It's a sort of shiny yellow colour. You can also buy rose gold, white gold, green gold, pale yellow gold, and red gold. Today gold in its pure "shiny yellow" form is rarely used to produce jewelry. Twenty-four-karat gold is too soft and not durable enough to use for jewelry. Jewelers use different alloys, combining gold with other metals to give it more hardness. For example, the most popular grade of gold purity in the United States is 18-karat, meaning three-quarters of the alloy is gold and one-quarter is a mixture of copper and silver. Mixing in silver and copper is a bit of science-if too much silver is added, the gold will show a green tinge. On the other hand, mixing in too much copper will give gold a red tinge (so-called "rose gold"). Addition of nickel or palladium overpowers the distinctly bright yellow color of gold, producing what is known as "white gold." Mixing other metals with gold produces a variety of colored golds, such as green gold , pale yellow gold , yellow gold, red gold, and white gold.
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It varies in coins, in the U.S. we use copper for pennies, nickel for nickels,dimes, quarters and half-dollars. The reason why is because the cheapness of getting the metal, and so on and so forth.CorrectionThe US Mint lists specifications for all current US coins: 1¢ : copper-plated zinc, 97.5% zinc and 2.5% copper5¢ : 25% nickel and 75% copper10/25/50¢ : outer layers of 25% nickel and 75% copper bonded to a pure copper core$1 : outer layers of manganese-brass bonded to a pure copper core
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