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. 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?

X: Beta particle, Y: Alpha Particle, Z: Gamma Rays

X: Alpha particle, Y: Beta Particle, Z: Gamma Rays

X: Gamma Rays, Y: Beta Particle, Z: Alpha Particle

X: Gamma Rays, Y: Alpha Particle, Z: Beta Particle

2. $^{14}_{6} \text{C}$ 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} $?

The nitrogen atom has one proton more than the carbon atom.

The nitrogen atom has one electron less than the carbon atom.

The nitrogen atom has one neutron more than the carbon atom.

The nitrogen atom has one proton less than the carbon atom.

3. The nucleus of a nitrogen atom can be represented as $^{14}_{7} \text{N}$.

The nucleus of this atom consists of

14 protons and 7 electrons.

7 protons and 7 electrons.

7 protons and 7 neutrons.

14 protons and 7 neutrons.

4. Atoms P and Q are isotopes. How does the composition of neutral atom P compare with neutral atom Q?

B

C

A

D

5. 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?

$\frac{1}{3}$

$\frac{1}{6}$

$\frac{1}{4}$

$\frac{1}{8}$

6. The table shows the possible properties of radioactive emissions.

Which emission could be a beta-particle?

D

C

A

B

7. The neutral atoms of all isotopes of the same element contain the same number of __________.

neutrons and protons.

neutrons only.

electrons and neutrons.

electrons and protons.

8. Which equation shows a nuclear fission reaction?

$^{239}_{92}\text{U} \rightarrow \, ^{95}_{38}\text{Sr} + \, ^{141}_{54}\text{Xe} + 3 \text{ neutrons}$

$^{46}_{21}\text{Sc} \rightarrow \, ^{46}_{21}\text{Sc} + \text{gamma ray}$

$^{14}_{7}\text{N} + \text{neutron} \rightarrow \, ^{15}_{7}\text{N}$

$^{2}_{1}\text{H} + \, ^{2}_{1}\text{H} \rightarrow \, ^{4}_{2}\text{He}$

9. The results of the Rutherford experiment provide evidence for the presence of the nucleus within the atom.

What were scattered in this experiment?

beta-particles

alpha-particles

gold nuclei

gamma rays

10. Which row gives the range and electrical charge of an alpha-particle?

	Range In Air	Electrical Charge
A	A few centimetres	Negative
B	A few centimetres	Positive
C	A few metres	Negative
D	A few metres	Positive

C

A

D

B

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