Exam-style question
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Explain when nuclear decay occurs and when a chemical change occurs. How can you distinguish between the two?.
Model answer
What a good answer should say
- Nuclear decay occurs in unstable isotopes when they seek stability by emitting radiation, while chemical change occurs during reactions where substances transform into different substances through bond breaking and forming.
- You can distinguish between the two by noting that nuclear decay results in a change of the element itself, whereas chemical changes do not affect the atomic nuclei.
Explanation
Why this works
This question assesses the ability to apply knowledge of nuclear and chemical processes in practical contexts. It requires students to explain the conditions under which each process occurs and how to differentiate between them, reinforcing their understanding of atomic behavior.
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