AQA GCSE Physics · 8463
Specification 4.4.2.1 · Paper 1
- Revise: Radioactive decay and nuclear radiation
The unit of activity; one becquerel means one nuclear decay per second.
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GCSE Physics · key term
The unit of activity; one becquerel is one nuclear decay per second.
Used by AQA and Edexcel
Specification 4.4.2.1 · Paper 1
The unit of activity; one becquerel means one nuclear decay per second.
Specification 6.24, 6.27 · Paper 1
The SI unit of radioactive activity. One becquerel is equal to one nuclear decay per second.
Activity is measured in becquerels, with the unit symbol .
Write the unit name as becquerel and the symbol as Bq; the symbol has a capital B and a lower-case q.
If a source has an activity of 500 Bq, interpret this as 500 nuclear decays per second.
Keep units throughout. Activity is measured in becquerels (Bq), while half-life may be given in seconds, hours, days or years.
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