# Explain why metals are good conductors of electricity.

> AQA GCSE Chemistry (8462) — 4.2.1 Chemical bonds, ionic, covalent and metallic · Explain · 4 marks

## Mark scheme (4 marks)

1. Metals contain delocalised electrons
2. The delocalised electrons are free to move through the structure
3. When a voltage / potential difference is applied, the delocalised electrons move in the same direction
4. This movement of charged particles carries electrical energy / constitutes an electric current

## Key terms

- [conductor](https://www.gradenine.co.uk/glossary/conductor)

## Related

- [Revision notes for AQA GCSE Chemistry (8462)](https://www.gradenine.co.uk/learn)
- [How to answer "Explain" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
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