Noble Gases

• Noble gas properties:

  • Density increases down the group
  • Monoatomic and colorless
  • M.P. and B.P. increases down the group
  • Don’t conduct electricity
  • Inert due to full outer shell electrons
• Noble Gases uses:

  • Helium- filling balloons and aircrafts because it is lighter than air and will not catch fire.
  • Argon – filling (tungsten) light bulbs to stop the filament reacting with oxygen.
  • Neon – is used in advertising signs because it glows red.