What is it
Students study the development of the atomic model, radioactive decay, types of radiation (alpha, beta, gamma) and their properties, half-life calculations, and uses and dangers of radioactivity.
Why it matters
This topic connects to real applications students may already know about — medical scans, radiotherapy, nuclear power — while also being one of the more mathematically distinct topics via half-life calculations.
Exam tip
Learn the relative penetrating power and range of alpha, beta and gamma radiation as a fixed comparison table — 'which type of radiation for which use' questions rely directly on this comparison.
Related topics
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