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5.2.4a Half-life

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Question 34

A sample of a radioactive material has a half-life of 15 minutes15\text{ minutes}15 minutes. Which statement is correct?

A

After 20 minutes20\text{ minutes}20 minutes, more than half of the material remains.

B

After 30 minutes30\text{ minutes}30 minutes, half of the radioactive material has decayed.

C

After 45 minutes45\text{ minutes}45 minutes, an eighth of the radioactive material remains.

D

After 60 minutes60\text{ minutes}60 minutes, a tenth of the radioactive material remains.

Markscheme

5.2.4a Half-life Questions

  1. IGCSE
  2. /Physics
  3. /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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