Other questions in this quiz

2. Helium is used in airships and party balloons, why?

  • same density as air so makes it float
  • has a lower density than air- makes the ballon float
  • higher density than air- makes it float
  • lower density than oxygen which makes it flow

3. the boiling points and densities of the noble gasses increase as you move

  • dowwwn the group
  • down the group
  • up the group
  • dwn the group

4. argon can be used to protect metals that are being welded. why?

  • the inhert atmospher stops the ho meatal reacting with oxygen
  • the inhert atmospher stops the hot metal reacting with oxygen
  • lighter than helium

5. why dont noble gasses react with much?

  • they have too many protons
  • becasue they have a full outer shell
  • they have one electron
  • because they dont want to


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