C2: Giant Covalent Structures

Here are a set of revision cards for students taking AQA Additional Science. These cards are based on Giant Covalent Structures from the C2 (chemistry) section. Hope these help you to revise! Please rate and comment on how to improve :) Also, I have a study group called AQA Additional Science where we discuss this topic and more. Feel free to become a member, the more the merrier!

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  • Created by: I P B
  • Created on: 18-12-09 11:31

Giant Covalent Structures

Giant Covalent structures:

  • formed from a large number of atoms
  • have strong covalent bonds
  • have high melting points and boiling points
  • are insoluble in water
  • do not conduct electricity (except graphite)
  • examples: graphite, diamond and silicon dioxide
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Diamond

  • a form of carbon
  • very hard with a high melting point
  • each carbon atom is bonded to four other carbon atoms
  • strong covalent bonds
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Graphite

  • a form of carbon
  • each carbon atom is bonded to three carbons
  • strong covalent bonds
  • bonds between layers are weak, so the layers slide over eachother
  • each carbon atom has a free, delocalised electron which passes through the layers
  • can conduct electricity
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Silicon Dioxide

  • also known as silica
  • has a very high melting point
  • each oxygen atom is joined to two silicon atoms
  • each silicon atom is joined to four oxygen atoms
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Comments

John

nice - thanks for uploading - could do with a bit more detail though :> but never the less a good attempt

I P B

John wrote:

Thats ok, thankyou! What detail do you think I have missed out? I will then add it in :D

nice - thanks for uploading - could do with a bit more detail though :> but never the less a good attempt

harshini vasik

Good !! can be made better

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