AQA · Chemistry · 8462
GCSE Chemistry: Graphene and fullerenes
Bonding, structure, and the properties of matter · AQA GCSE Chemistry (8462), specification point 4.2.3.3. Cards are generated from the exam board's own specification for "Graphene and fullerenes", and every card links back to the page it came from. Specification © AQA — used with attribution.
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What is graphene?
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A single layer of graphite — a one-atom-thick sheet of carbon atoms bonded in hexagonal rings.
Name two applications where graphene's properties make it useful.
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Electronics and composites.
Why is graphene a good electrical conductor?
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Each carbon atom bonds to only three others, so one electron per atom is delocalised and free to move across the sheet.
Why is graphene very strong despite being one atom thick?
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Its carbon atoms are held in the sheet by strong covalent bonds.
What are fullerenes?
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Molecules of carbon atoms with hollow shapes.
The structure of fullerenes is based on ? rings of carbon atoms.
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hexagonal
Besides hexagons, what ring sizes can fullerene structures contain?
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Rings with five or seven carbon atoms.
What was the first fullerene to be discovered?
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Buckminsterfullerene (C60).
How many carbon atoms are in a molecule of Buckminsterfullerene?
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60 (formula C60).
What shape does a Buckminsterfullerene molecule have?
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Spherical (a hollow ball).
What is a carbon nanotube?
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A cylindrical fullerene with a very high length-to-diameter ratio.
Give two uses of carbon nanotubes.
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Any two of: nanotechnology, electronics, materials (e.g. reinforcing composites).
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