Starter quiz
- What does the term 'allotrope' mean in chemistry?
- a type of chemical reaction
- a different physical form in which an element can exist ✓
- a compound formed from two or more elements
- a mixture of two substances
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- Match the carbon allotrope to its primary use.
- diamond⇔cutting tools ✓
- graphite⇔lubricant ✓
- coal⇔fuel ✓
- Which statement correctly describes the bonding in graphite?
- Each atom forms four single bonds with other atoms.
- Each atom forms double bonds with three other atoms.
- Each atom forms three single bonds with other atoms and has one free electron. ✓
- Each carbon atom is bonded to four other atoms in a layered hexagonal structure.
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- Graphite is used as a lubricant because it is ...
- oily and wet.
- hard and durable.
- soft and slippery. ✓
- sticky and thick.
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- Why does graphite conduct electricity?
- it has free moving ions
- each carbon atom donates multiple electrons to a 'sea of electrons'
- it contains metallic bonds
- one electron from each carbon atom is delocalised across the structure ✓
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- Graphite exists as a layered structure of hexagonal rings of carbon atoms, each bonded to three other atoms. Between the layers there are weak ______ holding them together.
- forces of attraction ✓
- intermolecular forces
- covalent bonds
- ionic bonds
- metallic bonds
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