Units (Radioactivity)

1 mark · Normal

Which of the following combinations is correct for measuring the rate at which a radioactive sample decays?

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Correct option: Counts per second (Bq)

Common mistakes: Counts per centimetre (Bq/cm); Seconds per decay (s)

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Marking points

A1 · 1 mark · Correct answer: Counts per second (Bq)

Worked solution

Becquerels (Bq) are defined as counts per second, the SI unit of activity.