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2. How can we use diffusion to investigate particles?

  • Wait, for five minutes, for the bromine gas to diffuse from its flask to the other
  • Release bromine gas into the atmosphere

3. What is filtration?

  • The separation of an undissolved solid from a mixture of the solid and a liquid/solution
  • Extracting aluminium from its ore bauxite

4. What is a molecule?

  • A group of 2 or more atoms bonded together
  • A mixture of substances

5. What is an element?

  • A pure substance that is listed on the Periodic Table and has only one type of atom
  • Dirt
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