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4.4 Atomic structure

Quick questions on Half-life - AQA GCSE Physics

2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?
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Define the half-life of a radioactive isotope. [2 marks]
What is q2?
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A source has an activity of 640Bq640\,Bq and a half-life of 22 hours. What is its activity after 66 hours? [3 marks]

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