Specification Point 2.26C (Paper 2C Only):
Know that an Alloy is a mixture of a Metal and one or more elements, usually other metals or Carbon

Alloys

Alloy: A mixture of a metal and one or more elements, usually other metals or carbon

  • Alloys often have properties that are different to the metals they contain, making them more useful than the pure metals alone.
Alloy atom layers, Edexcel IGCSE Chemistry

The layers of atoms in an Alloy

Specification Point 2.27C (Paper 2C Only):
Explain why Alloys are harder than Pure Metals

Alloys & Pure Metals

Alloy: A mixture of a metal and one or more elements, usually other metals or carbon

Why Alloys are harder than Pure Metals:

Alloy atom layers, Edexcel IGCSE Chemistry

The layers of atoms in an Alloy

  • Alloys are often harder than pure metal as they contain atoms of different sizes, which distorts the regular arrangements of atoms
  • This makes it more difficult for the layers to slide over each other, making it harder and stronger than pure metal (atoms in pure metals are the same size in regular arrangement so can slide over each other easily).

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Author: Jamie

Jamie got a First class degree in Chemistry from Oxford University before going on to teach chemistry full time as a professional tutor. He’s put together these handy revision notes to match the Edexcel IGCSE Chemistry specification so you can learn exactly what you need to know for your exams.