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Radioactive decay
Compare alpha, beta and gamma radiation and interpret half-life graphs to predict how the activity of a radioisotope changes over time.
⏱ 20 min❓ 9 questions
What you'll be able to do
- ✔I can describe alpha, beta and gamma radiation in terms of their nature, charge and penetrating power
- ✔I can describe how alpha and beta decay change the atomic and mass numbers of a nucleus
- ✔I can use a half-life graph or table to calculate half-life and predict remaining activity
How this works
- 1Read the short explanations first — they teach you what you need before each question.
- 2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
- 3Finish all 4 steps to see your score — sign in and subscribe to unlock the full lesson and save it.
What's inside
9 questions and 2 quick teaching cards, including:
- 🔗Match the pairs — Choose the partner that goes with each item.
- 🔘Multiple choice — Tap the answer you think is best, then check it.
👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.
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Curriculum: AC9S9U05