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. What is the safest way to dispose of a large quantity of highly radioactive waste?
2. The nucleus of a nitrogen atom can be represented as $^{14}_{7} \text{N}$.

The nucleus of this atom consists of
3. A nuclide of the element plutonium is $^{242}_{94} \text{Pu}$.

What is the number of neutrons in its nucleus?
4. 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
5. 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
6. 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?
7. A radioactive isotope has a half-life of 2 minutes.

What can be deduced from this statement?
8. Which of the following affects the activity level of a radioactive source?
9. The half-life of radioactive carbon is 5600 years. What will be the time after which the activity has reduced to one-quarter?
10. Atoms P and Q are isotopes. How does the composition of neutral atom P compare with neutral atom Q?

isotope qn

 

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