Practice MCQs For Radioactivity and the nuclear atom

This quiz contains practice questions for GCE ‘O’ level topic: Radioactivity and the nuclear atom. There are explanations for some of the questions after you submit the quiz. If you could not figure out why a particular option is the answer, feel free to drop a comment below or ask a question in ‘O’ & ‘A’ Level Discussion section of the forum. If you wish to contribute questions to this quiz, please contact us.

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1. There are possible dangers when dealing with radioactive substances.

Which statement is correct?
2. Deuterium $^{2}_{1}\text{H}$ and tritium $^{3}_{1} \text{H}$ are two isotopes of hydrogen.

Compared to a deuterium atom, how many protons and neutrons does a tritium atom have?
3. Which of the following affects the activity level of a radioactive source?
4. X, Y and Z are three types of radiation.

X is almost completed absorbed by 5 cm lead but not by 5 mm aluminium.

Y is almost completely absorbed by 5 mm aluminium but not by thin card.

Z is absorbed by thin card.

What are X, Y and Z?
5. Which conclusion can be drawn from the Geiger-Marsden alpha-particle scattering experiment?
6. Which of the following occurs in the decay of a radioactive nucleus?
7. A radioactive source has a half-life of 24 hours. At 1:00 am, it has an activity of 1000 counts per minute. At 1:00 pm on the same day, what is its most likely activity?
8. Atoms P and Q are isotopes. How does the composition of neutral atom P compare with neutral atom Q?

isotope qn
9. A pupil investigates the penetrating power of radiation from a radioactive source.

gm tube qnThe table shows her results.

gm tube qn ansThe source emits
10. Three nuclei P, Q and R have proton numbers (atomic numbers) and nucleon numbers (mass numbers) as shown.

  • Proton number: 43
  • Nucleon number: 93
  • Proton number: 43
  • Nucleon number: 94
  • Proton number: 44
  • Nucleon number: 94

Which nuclei are isotopes of the same element?


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