Physics for IGCSE & O level - Atoms And Radioactivity (Section 4 - No. 31)
What does the 'activity' of a radioactive sample refer to?
The time it takes for the sample to decay completely
The rate at which the sample decays
The mass of the sample
The volume of the sample
Explanation
The activity of a radioactive sample refers to the rate at which the sample decays.
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