Question Constellation Sign up for free AQA · GCSE · Combined Science · Higher
Unit of the activity of a radioactive source
A scientist investigated a sample of a radioactive material to determine if it would be suitable for medical use.
The activity of a radioactive source is the rate at which the nuclei of the source decay.
What is the unit for the activity of a radioactive source?
Write your answer first. You can study the marking guidance whenever you need it.
Study the marking See what earns credit and compare it with a full-mark answer.
Marking points
- 1 Give the unit as becquerel or Bq.
Full-mark answer
Becquerel, or Bq.
Why this answer loses marks
counts per second
Counts per second is a count-rate unit; the named unit for activity is becquerel.