Group 0

• Group 0 elements are called noble gases
• What are group elements known as

  Noble gases
• What are all group 0 elements

  Inert,colourless gases

  - Very low melting and boiling points

  - poor conductors of heat and electricity
• What elements does it include

  - Helium

  - Neon

  - Argon

  
  

  (In order)
• How many electrons do they have in their outer energy level

  8, giving them a fuller outer shell

  exception is helium - has 2 electrons
• How do the Nobles exist?

  single atoms
• Boiling points

  Boiling points increase as relative atomic masses increase-as you go down the group
• Why are they generally unreactive apart from helium

  They are stable - they don't need to give up or gain electrons to become more stable
• What are elements in group 0 at room temperature

  colourless gases
• What is a result of group 0 gases being inert

  They're non-flammable / won't set on fire
• Why do boiling points increase as you go down the group

  Larger atoms so have greater intermolecular forces between them so more energy needed to break bonds
• Why is argon unreactive

  It has a full outer shell so it doesn't have to readily lose or gain electrons
• What is Krypton used for?

  Used in photography lighting

  produces good white light when electricity passes through it
• What is Helium used for?

  In airships and party balloons

  Has lower density than air -so makes balloons float

  Non-flammable -so safer to use
• What is neon used for?

  Produces a distinctive orange light when electricity passed through it

  - used for illuminated signs
• Why is Argon used in older metal filament ( glowing wire) light bulbs?

  It is there instead of air which has oxygen, as Argon is inert, the metal filament won't react with it
• Atoms are stable when they have a full outer shell/energy level
• All noble gases have a full outer energy level - makes them unreactive