← all questions · Physics · 0625 · Paper 4
The half-life of an americium nuclide is 470 years. A sample of this nuclide contains 8.0 × 10¹⁴ atoms. After some time, 6.0 × 10¹⁴ americium atoms have decayed.
Calculate the time required for this decay.
0625/04/SP/23Cambridge IGCSE Physics 0625 · Specimen 2023 · Paper 4 · Question 10(b)
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Suggested time: 5 min