GCSE Physics 2020-2022 OCR Gateway: So if a Nuclei has an Activity of 1000 Bq, and has a Half Life of 5 Years, how long would it take for the Activity to drop to 250 Bq?

Question

So if a Nuclei has an Activity of 1000 Bq, and has a Half Life of 5 Years, how long would it take for the Activity to drop to 250 Bq?

eric_galvao · Accepted Answer

-After 1 Half life, the Activity would become 500 Bq
-After 2 Half Life, the Activity would become 250 Bq
-So it takes 10 Years to drop to its Quarter

GCSE Physics 2020-2022 OCR Gateway

So if a Nuclei has an Activity of 1000 Bq, and has a Half Life of 5 Years, how long would it take for the Activity to drop to 250 Bq?

-After 1 Half life, the Activity would become 500 Bq -After 2 Half Life, the Activity would become 250 Bq -So it takes 10 Years to drop to its Quarter

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