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1. What will the experiment show?

  • Both air and bromine particles are moving randomly and there re large gaps between the particles: therefore, they can easily mix together
  • They are very fast
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2. What is a mixture?

  • An impure substance made from different elements or compounds
  • A pure substance made from different elements

3. 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

4. What is paper chromatography?

  • The separation of substances that have different solubilities in a given solvent
  • Coloured paper used to identify a substance's pH levels

5. What is an atom?

  • The smallest particle of an element
  • Part of a molecule


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