Physics for IGCSE & O level - Atoms And Radioactivity (Section 3 - No. 27)
What is meant by the term 'activity' of a radioactive source?
The energy released per decay
The rate of decay of the radioactive substance
The weight of the radioactive material
The half-life of the radioactive substance
Explanation
The activity of a radioactive source refers to the rate of decay, or disintegrations per second.
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