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6. Could the atoms join together to make a new substances?

  • Yes
  • No

7. 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

8. How can scientists measure very small forces?

  • They use probes to detect particles and reposition them (atomic force microscopes)
  • Weights
  • Microscope
  • Magnify Glass

9. How many atoms are in our body?

  • 60
  • 26
  • 20
  • 1

10. How can information from chromatograms be used to identify the composition of a mixture

  • Calculate the distance moved by the compound/the distance moved by the solvent
  • Use universal indicator

11. 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

12. What is a molecule?

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

13. What is an element?

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

14. 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

15. What is an atom?

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

16. What is a compound?

  • A pure substance made from more than one type of element, after being chemically bonded
  • An impure substance

17. What is diffusion?

  • When a gas moves freely from an area of high concentration to low concentration
  • When a gas gives of a smell

18. How many different types of atom can be found naturally in the Earth?

  • 10
  • 100
  • 92
  • 29

19. How can we use dilution of coloured solutions to detect atoms?

  • When a solute (the dissolved substance in solution) is dissolved in a solvent
  • Use a microscope

20. 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