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This lesson covers the three main types of nuclear radiation — alpha (α), beta (β) and gamma (γ) — including their nature, penetrating power, ionising ability and behaviour in electric and magnetic fields. This is a core part of the Radioactivity section of the Edexcel GCSE Combined Science specification (1SC0).
Some atomic nuclei are unstable — they have too many or too few neutrons relative to protons. To become more stable, the nucleus emits radiation in a process called radioactive decay. This is a random and spontaneous process:
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