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