# Describe the limitations of the particle model when used to explain the behaviour of substances.

> Eduqas GCSE Chemistry — 2.1 Bonding, structure and properties · Describe · 4 marks

> The particle model represents particles as small, solid spheres and is used to explain the three states of matter and changes of state.

## Mark scheme (4 marks)

1. The particle model does not show forces between particles
2. All particles are represented as spheres, but real particles are not spherical
3. The spheres are shown as solid, but real particles are not solid objects
4. The particle model does not explain why atoms of some elements react with one another

## Key terms

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

## Related

- [Revision notes for Eduqas GCSE Chemistry](https://www.gradenine.co.uk/learn)
- [How to answer "Describe" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
- [Practice this with AI marking (free)](https://www.gradenine.co.uk/start)

---
Source: [GradeNine](https://www.gradenine.co.uk/q/describe-the-limitations-of-the-particle-f07382f2) · Published by Druglandscape Ltd.