What you'll learn
Radioactivity and nuclear energy.
Key ideas
- Alpha, beta and gamma radiation: ionising power and penetration.
- Half-life and random decay.
- Nuclear fission in power stations.
Exam tips
- Rank the radiations by penetration.
- Use half-life to find the fraction remaining.
Common mistakes
- Confusing alpha and gamma.
- Mixing up fission and fusion.