Exam-style question
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What is radioactive decay and how does it occur?.
Model answer
What a good answer should say
- Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation.
- This occurs because the nucleus has an excess of energy or mass, leading to a transformation into a more stable state.
- As a result, the nucleus emits particles or electromagnetic waves, which can lead to the formation of different elements or isotopes.
Explanation
Why this works
This answer is strong because it clearly defines radioactive decay and explains the mechanism of instability in the nucleus. It also describes the effect of radiation emission and its consequence of forming more stable nuclei, demonstrating a comprehensive understanding of the concept.
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