Structure and Bonding [carbon] - Chemistry Paper 1 Flashcards
What are allotropes?
Different structural forms of the same element
How many bonds does diamond make?
4
Why can’t diamond conduct electricity?
because all 4 electrons are used in bonding
Why is diamond hard/can’t be stractched?
Because in order to scratch diamond the strong covalent bonds need to be overcome and this requires a lot of energy
Why does diamond have a high melting point?
Because it takes a lot of energy to overcome the strong covalent bonds
How many bonds does graphite make?
3
Why can graphite conduct electricity?
Because there’s one free electron that can move between graphite’ layers and carry a charge
Why is graphite soft and slippery?
Because it contains layers which are held together by weak intermolecular forces. This allows for the layers of graphite to move over each other
Why does graphite have a high melting point?
Because the covalent bonds in the layers need a lot of energy to break
What is graphene?
A sheet of carbon atoms joined together in hexagons/or, a single layer of graphite
How thick is graphene?
Just one atom thick, meaning graphene is 2D
What are the properties of graphene?
very strong, very light, conductor of heat and electricity
What are the potential uses of graphene?
Composite materials, electroncs
What are fullerenes?
Hollow molecules of carbon, shaped like tubes or balls
What are fullerenes made up of?
Carbon atoms arranged in hexagons , pentagons, or heptagons
