Other questions in this quiz

2. noble gasses are

  • non flammble
  • non soft
  • flambable
  • on flambable

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

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

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


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