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5.2.4a Half-life

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Question 45

A sample of a radioactive isotope emits 8000 $β\beta$ -particles per second.

After 45 minutes, the rate of emission has fallen to 250 $β\beta$ -particles per second.

What is the half-life of this isotope?

A

$minutes3.0\text{ minutes}$

B

$minutes9.0\text{ minutes}$

C

$minutes15\text{ minutes}$

D

$minutes22.5\text{ minutes}$

Markscheme

5.2.4a Half-life Questions

IGCSE
Physics
5.2.4a Half-life

144 exam-style questions on CIE IGCSE Physics 5.2.4a Half-life. Each one has a worked solution and a mark scheme showing where the marks go.

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