IB skill practice

Calculate activity and decay constants

Official-syllabus Physics skill catalogue entry. Seeded skills are activated only after exam-style question templates pass validation.

Paper 1, Paper 2 5 marks Difficulty 4

Activity after exponential decay

A source in a fission energy data set has initial activity \(1350\,\text{Bq}\) and decay constant \(0.038\,\text{s}^{-1}\). Calculate the activity after \(17\,\text{s}\). Enter the numerical result and choose the interpretation that matches the nuclear physics meaning.

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