Structure and bonding of carbon Flashcards
1
Q
What are the forms of carbon?
A
- Graphene
- Diamond
- Fullerenes (carbon nanotubes)
- Graphite
2
Q
What is the structure of diamond?
A
- Each carbon bonded to 4 others
- Giant covalent lattice
- No free electrons
3
Q
What is the structure of graphite?
A
- Each carbon is bonded to 3 others
- Arranged in layers
- Contains delocalised electrons because each C is bonded to 3 others
4
Q
What is the structure of graphene
A
- Single layer of graphite
- Contains delocalised electrons that are free to move through the structure
5
Q
What is the structure of carbon nanotubes?
A
- Layer of graphene rolled into a tube shape
- Have delocalised electrons that can flow through the structure and carry charge
6
Q
Why does diamond have a high melting point?
A
- Covalent bonds between carbon atoms are very strong
- Lots of energy required to break the bonds
- High melting point
7
Q
Why is diamond hard?
A
- Carbon bonded to 4 other carbon
- Strong bonds between carbon mean its hard to break
8
Q
Why can graphite conduct electricity?
A
Delocalised electrons can flow through the structure and carry charge
9
Q
Why is graphite soft and slippery?
A
- arranged in layers which have weak forces between them
- Layers can slide over each other easily
