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 diagram shows how the thickness of paper is measured during a manufacturing process.

If the sheet is too thick, fewer beta-particles can reach the detector.

manufacturing qnA source of alpha-particles is not used for this purpose because alpha-particles
2. Which of the following occurs in the decay of a radioactive nucleus?
3. A nucleus is represented by $^{230}_{91} \text{Z}$. It emits one alpha-particle and then one beta-particle. What is the resulting nucleus X?
4. There are possible dangers when dealing with radioactive substances.

Which statement is correct?
5. What is the safest way to dispose of a large quantity of highly radioactive waste?
6. 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?
7. Which of the following affects the activity level of a radioactive source?
8. Which equation shows a nuclear fission reaction?
9. The neutral atoms of all isotopes of the same element contain the same number of __________.
10. The ionization in air caused by three different radiations X, Y and Z are as follows:
RadiationIons produced per mm of path
X4000
Y50
Z200
Which of the following correctly identifies the radiation X, Y and Z?

 

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