Allotropes Of Carbon Flashcards
What structure type is a diamond and what is made up of?
It has Giant covalent covalent structure and it’s made up of carbon atoms that each form 4 covalent bonds
How many covalent bonds does each carbon atom form in that of a diamond?
4 per carbon atom
Why are the boiling and melting points for a diamond very high?
You need to break strong covalent bonds so it takes alot of energy to break them
Do diamonds conduct electricity?
No they are insulators as they have no delocalised electrons and therefore no electrons can carry charge through the structure
What structure type is a graphite and what is made up of?
It has a Giant Covalent structure and only forms 3 covalent bonds creating sheets of carbon atoms arranged in hexagons
How many covalent bonds does graphite form?
3
Why are the boiling and melting points for graphite very high?
You need to break strong covalent bonds so it takes alot of energy to break them
Does graphite conduct electricity?
Yes- graphite is a conductor 3 out of its 4 outer electrons are used in bonds, so each atoms has 1 delocalised electron that can carry charge through the structure
How strong is a diamond?
Very strong and hard- it forms 4 covalent bonds which take alot of energy to break
How strong is graphite?
It is soft and brittle- they’re aren’t any covalent bonds between the layers so they’re only held together weakly so they’re free to move over eachother. This makes graphite soft and slippery and ideal for lubricating metals
What structure type is buckminsterfullerene and what is it made up of?
It has a simple molecular structure and is made up of molecules of carbon in a spherical shape.They’re mainly made up of carbon atoms arranged in hexagons but they can also be arranged in pentagons or heptagons
What is the formula for buckminsterfullerene?
Why are the melting points and boiling points for buckminsterfullerene not so high?
You need to overcome relatively weak forces between molecules (no covalent bonds broken)
Does buckimistefullerene conduct electricity?
No- it is an insulator as its has delocalised electrons but they cannot move from one molecule to another
How many covalent bonds does buckiministerfullerene form?
3
What structure type is graphene and what is it made up of ?
It has a giant covalent structure and is a sheet of carbon atoms joined together in hexagons. The sheet is just one atoms thick making it a 2 dimensional substance.
