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. The half-life of radioactive carbon is 5600 years. What will be the time after which the activity has reduced to one-quarter?
2. A nucleus consists of 90 protons and 144 neutrons.

After emitting two beta-particles followed by an alpha-particle, this nucleus has:
3. What is the safest way to dispose of a large quantity of highly radioactive waste?
4. A radioactive isotope has a half-life of 2 minutes.

What can be deduced from this statement?
5. A nuclide of the element plutonium is $^{242}_{94} \text{Pu}$.

What is the number of neutrons in its nucleus?
6. Which equation shows a nuclear fission reaction?
7. Atoms P and Q are isotopes. How does the composition of neutral atom P compare with neutral atom Q?

isotope qn
8. The half-life of a radioactive material is 24 years.

The activity of a sample falls to a fraction of its initial value after 72 years.

What is the fraction?
9. Which action will most increase a person's exposure to radioactivity?
10. Between 1909 and 1911, Geiger and Marsden carried out experiments in which alpha particles were fired at metal foil. Most of the alpha particles passed through the foil with small deflections, but some were deflected through a large angle.

These results suggest that:

 

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