ATOMS AND RADIOACTIVITY
2 marks · Easy(a)[1 mark]
What is the unit used to measure the activity of a radioactive source?
(b)[1 mark]
Define this unit.
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(a) Becquerel (Bq)
(b) One disintegration (or decay) per second. · must show Accept: one decay per second
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Marking points
B1 (a) · 1 mark · States or writes "becquerel" or "Bq".
B1 (b) · 1 mark · Defines as event/decay per second.
Worked solution
a) Becquerel (Bq) b) One decay (disintegration) per second.