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  5. 6.4.1 Activity and its decrease over time

6.4.1 Activity and its decrease over time

Spec 1PH0

Revise Edexcel GCSE Physics 6.4.1 Activity and its decrease over time with the revision guides.

Describe how the activity of a radioactive source decreases over a period of time. • Recall that the unit of activity of a radioactive isotope is the Becquerel, Bq.

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