Physics 0625 · IGCSE · Radioactivity

Radioactivity — practice question

A sample of a radioactive isotope gives off particles at a rate of 240 per minute. After 48 hours, the emission rate falls to 15 per minute. What is the half-life of the radioactive material?

A4.0 hours
B8.0 hours
C12 hours
D16 hours

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