Other questions in this quiz

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

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

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

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

4. noble gasses are

  • non flammble
  • on flambable
  • non soft
  • flambable

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

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


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