Mini Chemistry
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Mini Chemistry

Understand matter, explain change.

Connect particles, observations and equations with lessons and practice for your course.

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Free lessons and practice. About and trust

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Open your course below. Not sure which to choose? Compare the options for your level.

Taking Science? Find your Science course.

Solid

Close and regular

Liquid

Close and irregular

Gas

Widely spaced

The particles stay the same size and identity; their arrangement changes. Solids vibrate in fixed positions, liquids flow, and gases spread through the space available. A particle model, not to scale.

Learn. Practise. Check.

How learning works

  1. Learn

    Build understanding with lessons and worked examples.

  2. Practise

    Try questions and use the feedback to improve.

  3. Check

    Pass a progress check on your own to record progress.

Learn by doing

Explore and practise Chemistry

Practise exam questions

Choose a topic check, written questions or a mock paper for your course.

Find practice

Explore the periodic table

Look up elements and compare how properties change across periods and down groups.

Open the periodic table

Build A-Level practical skills

Plan experiments, record observations and analyse results for practical assessment.

Study practical skills

Topic explorer

Find a place to start

Browse a short selection here, or open your course for its full topic list.

G3 Pure / O-Level Chemistry topics

View all G3 Pure / O-Level Chemistry topics

H2 Chemistry topics

View all H2 Chemistry topics

Latest updates

Pages we have recently updated, plus optional reading from the blog.

Recently updated

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Chemistry in context

Browse the blog