group 0 ( noble gases )

• what elements make up the noble gases ?

  • helium , krypton , neon , argon ,xenon and radon
• what colour and state are group 0 elements at room temperature ?

  • colourless gas
• what does it mean that all noble gases are monatomic ?

  • their gases are made up of single atoms and not molecules
• what does it mean that noble gases are inert ?

  • they don't react with much at all - this is because they have a full outer shell of electrons so they don't easily give up or gain electrons
• what does inert guarantee wont happen ?

  • they wont set on fire ( they're non flammable )
• what is argon for in everyday use ?

  • filament lamps ( light bulbs ) - since its non flammable it stops the hot filament from burning away
• what can argon and helium be used for ?

  • to protect metals that are being welded -inert atmosphere stops the hot metal reacting with oxygen
• how doe helium balloons work ?

  • it has a lower density than air so it makes the balloons float .
• why is helium safer to use than hydrogen gas ?

  • it is non - flammable
• what increases as you go down group 0 ?

  • boiling point , melting point and density
• why do elements in this group all react in similar ways ?

  • they all have the same number of electrons in their outer shells