AQA · Chemistry · 8462
GCSE Chemistry: Alloys as useful materials
Using resources · AQA GCSE Chemistry (8462), specification point 4.10.3.2. Cards are generated from the exam board's own specification for "Alloys as useful materials", and every card links back to the page it came from. Separate science only. Specification © AQA — used with attribution.
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Bronze is an alloy of which two metals?
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Copper and tin.
Brass is an alloy of which two metals?
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Copper and zinc.
What percentage of gold is in 18 carat gold?
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75% gold (24 carat is 100% pure gold, so 18/24 = 75%).
The proportion of gold in a gold alloy is measured in ?.
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carats
Which metals is gold jewellery usually alloyed with?
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Silver, copper and zinc.
Steels are alloys of which metal?
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Iron, with specific amounts of carbon and other metals.
What are the properties of high carbon steel?
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Strong but brittle.
What are the properties of low carbon steel?
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Softer and more easily shaped than high carbon steel.
Which two metals are added to iron to make stainless steel?
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Chromium and nickel.
What are the key properties of stainless steel?
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Hard and resistant to corrosion.
Aluminium alloys are useful because they have a low ?.
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density
Why are most metals in everyday use alloys rather than pure metals?
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Alloying changes a metal's properties (e.g. strength, hardness, corrosion resistance) to suit a particular use; pure metals are often too soft.
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