Atomic StructureComparison
Comparing Alpha, Beta, and Gamma Radiation
Part of Radioactive Decay — GCSE Physics
This comparison covers Comparing Alpha, Beta, and Gamma Radiation within Radioactive Decay for GCSE Physics. Revise Radioactive Decay in Atomic Structure for GCSE Physics with 13 exam-style questions and 6 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 7 of 14 in this topic. Use this comparison to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 7 of 14
Practice
13 questions
Recall
6 flashcards
⚖️ Comparing Alpha, Beta, and Gamma Radiation
| Property | Alpha (α) | Beta (β) | Gamma (γ) |
|---|---|---|---|
| Nature | 2p + 2n (He-4 nucleus) | Fast electron | Electromagnetic wave |
| Charge | +2 | −1 | 0 |
| Mass | 4 u | ~0 | 0 |
| Range in air | Few cm | ~1 m | Unlimited (reduced) |
| Stopped by | Paper, skin | Few mm aluminium | Thick lead / concrete |
| Ionising power | High | Medium | Low |
| Speed | Slow (~0.05c) | Fast (~0.9c) | c (speed of light) |