Chemistry

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Why are alloys likely to be harder than pure metals?
Because layers of atoms cannot slide over each other easily.
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What is the cathode (negative electrode) made from when copper is purified by electrolysis?
The cathode (negative electrode) is made from pure copper when copper is purified by electrolysis.
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What is a metal ore?
A rock containing a metal, or a metal compound, in high enough concentration to make it economic to extract the metal.
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What happens after the metal is concentrated?
It is extracted and purified.
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Which metals are extracted by electrolysis?
potassium sodium calcium magnesium aluminium
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How is Iron extracted from its ore?
iron oxide + carbon → iron + carbon dioxide 2Fe2O3 + 3C → 4Fe + 3CO2
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Card 2

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What is the cathode (negative electrode) made from when copper is purified by electrolysis?

Back

The cathode (negative electrode) is made from pure copper when copper is purified by electrolysis.

Card 3

Front

What is a metal ore?

Back

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Card 4

Front

What happens after the metal is concentrated?

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Card 5

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Which metals are extracted by electrolysis?

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