simple and giant molecular substances

• what are the properties of simple molecular substances ?

  -simple structure

  -weak inter molecular forces (this causes low mp and bp)

  -usually gas or liquid at room temp- dont conduct electricity because they are not charged and do not have any delocalised electrons
• what are the three main giant covalent structure you need to know ?

  .diamond

  .graphite

  .silicon dioxide
• why is graphite soft and slippery and can conduct electricity ?

  only the weak intermolecular forces need to be broken not strong covalent bonds this alows the layers to slide - it has 1 delocalised electron per carbon atom
• what is graphene ?


  a singular layer of graphite
• what are some uses of graphene ?

  Electronics (becasue of the 1 delocalised electron), composite materials (strengthens without adding weight)
• what are fullerenes ?

  Molecules made entirely of carbon shaped like closed tubes or hollow spheres
• what Fullerene has the formula C60

  Buckminsterfullerene

  
• what uses does buckminsterfullerene have ?

  can form around another molecule - can deliver a drug in the body
• what uses do fullerenes have ?

  Nanotechnology, medicine, strengthen materials without adding much weight