Every mark, explained.

Answer exam questions for your board and see exactly which marks you got, and which you missed.

3

Explain why graphite conducts electricity.

2/ 3 marks

Each carbon is bonded to three others, so one electron from every atom is delocalised.

Awarded: Each carbon atom forms three covalent bonds
Awarded: One electron per atom is delocalised
Missed: Delocalised electrons move and carry charge

so that's the mark I lost

GCSE, IGCSE, A-Level, IB MYP and IB Biology, Chemistry, Physics and Maths, plus A-Level Further Maths and IB ESS.

Every mark, explained.

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