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.

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1. 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?
2. Which of the following occurs in the decay of a radioactive nucleus?
3. Atoms P and Q are isotopes. How does the composition of neutral atom P compare with neutral atom Q?

isotope qn
4. 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:
5. 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?
6. The table shows the possible properties of radioactive emissions.

Which emission could be a beta-particle?

radioactivity qn
7. The diagram shows the apparatus used in an experiment in which barriers of various materials are placed in turn between different radioactive sources and a detector.

G-M tube and barrierThe table shows the count rates recorded by the detector for four sources.

Which source emits alpha-particles only?
SourceCount Rate (Counts Per Minute)
No barrierPaperThin AluminiumThick Lead
A20020020030
B200303030
C120060020030
D120012003030
8. Which statement is true for all three types of radioactive emission (alpha-particles, beta-particles and gamma-rays)?
9. $^{14}_{6} \text{C}$ represents a nuclide of the element carbon and $^{14}_{7} \text{N}$ a nuclide of nitrogen.

How does a neutral atom of $^{14}_{7} \text{N} $ differ from a neutral atom of $^{14}_{6} \text{C} $?
10. 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?
ProtonsNeutrons
AMoreMore
BMoreSame
CSameMore
DSameSame

 

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