C3.7 Giant covalent structures
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What are the 3 types of giant covalent structures?
➢ Diamond ➢ Graphite ➢ Graphene
What are some properties of giant covalent strucutures?
➢ High melting and boiling points ➢ Insoluble in water ➢ They do not conduct electricity apart from graphite
What are the arrangements of carbon atoms in graphite?
➢ Hexagons which are arranged in layers ➢ No covalent bonds between layers
Why can graphite layers slide over one another?
➢ Due to weak intermolecular forces ➢ Makes graphite a soft material
Why can graphite conduct electricity?
➢ Carbon atoms from three strong covalent bonds ➢ Leaving one delocalised electron ➢ They can carry a charge
Why can diamond not conduct electricity?
➢ Because there are no delocalised electrons