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.

The quiz comprises of 10 questions, which are randomly selected from a large pool of questions. After completion, you can refresh the page and try the quiz again for a new set of 10 questions.

Back To O Level Physics

Back To List of O Level Physics Quiz

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

Which statement is correct?
2. Which row gives the range and electrical charge of an alpha-particle?
Range In AirElectrical Charge
AA few centimetresNegative
BA few centimetresPositive
CA few metresNegative
DA few metresPositive
3. The results of the Rutherford experiment provide evidence for the presence of the nucleus within the atom.

What were scattered in this experiment?
4. A nucleus consists of 90 protons and 144 neutrons.

After emitting two beta-particles followed by an alpha-particle, this nucleus has:
5. Which of the following affects the activity level of a radioactive source?
6. Atoms P and Q are isotopes. How does the composition of neutral atom P compare with neutral atom Q?

7. A radioactive isotope has a half-life of 2 minutes.

What can be deduced from this statement?
8. The nucleus of a nitrogen atom can be represented as $^{14}_{7} \text{N}$.

The nucleus of this atom consists of
9. 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?
10. The half-life of a radioisotope is 2400 years. The activity of a sample is 720 counts/s.

How long will it take for the activity to fall to 90 counts/s?


Back To O Level Physics

Back To List of O Level Physics Quiz

Back To O Level Topic List

Sharing is caring:
Mini Physics

Administrator of Mini Physics. If you spot any errors or want to suggest improvements, please contact us.

8 thoughts on “Practice MCQs For Radioactivity and the nuclear atom”

    • As the source is too far from the counter the alpha particles are not able to reach till there as they can only travel few centimeters in the year.

    • As the definition for half-life is the time take for the acitivity of the radioactive material to be reduce by half.

      So if original was “1”, after 5600 years it will be 1/2. So after another cycle of 5600 years, it will reduce by half again so 1/2 divided by 2 is 1/4. So the time taken is 5600+5600=11200 years.


Leave a Comment