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5.2.4a Half-life

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Question 50

The half-life of a radioactive substance is 15 minutes. A sample of the radioactive substance contains 3000 nuclei. How many radioactive nuclei were in the sample one hour earlier?

A

$188$

B

$00012\,000$

C

$188$

D

$00048\,000$

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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