Chemistry combined
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Why can metals like potassium and aluminium not be extracted by reduction with carbon
they are more reactive than carbon
2
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What is an ore?
rock containing enough of a metal compound to be economically worth extracting
3
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How are metals more reactive than carbon extracted from their ores
Electrolysis
4
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Why are gold and silver found naturally as elements in the earths crust
They are very unreactive
5
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How are metals less reactive than carbon extracted from their ores
reduction with carbon
Note 
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