Radioactivity and Particles

2 marks · Easy

State the unit used for measuring the activity of a radioactive source. Which SI prefix would you use for an activity of 2,700,000 Bq?

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The unit is the becquerel (Bq); use megabecquerel (MBq) for 2,700,000 Bq.

Also accept: 2.7 MBq

Common mistakes: kBq instead of MBq

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Marking points

B1 · 1 mark · Correctly states 'becquerel (Bq)'

B2 · 1 mark · Correctly uses or states 'megabecquerel (MBq)' for 2,700,000 Bq

Worked solution

The activity of a radioactive source is measured in becquerels (Bq). 2,700,000 Bq = 2.7 megabecquerels (MBq).