Practice test

Radioactivity and nuclear energy - Test Set 2

Review 20 exam-focused questions with detailed explanations, then start the interactive test when you are ready.

20 questions

Questions and explanations

  1. Question 1

    What is the primary use of Iodine-131 in medicine?
    1. Cancer treatment
    2. Thyroid treatment
    3. Bone imaging
    4. Blood flow studies
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  2. Question 2

    Which process is used to determine the age of ancient rocks?
    1. Carbon dating
    2. Uranium-lead dating
    3. Potassium-argon dating
    4. Rubidium-strontium dating
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  3. Question 3

    Which radioactive series is also known as the 4n series?
    1. Uranium Series
    2. Neptunium Series
    3. Actinium Series
    4. Thorium Series
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  4. Question 4

    Which isotope is used for treating leukemia?
    1. Phosphorus-32
    2. Iodine-131
    3. Cobalt-60
    4. Technetium-99m
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  5. Question 5

    What is the half-life of Uranium-238?
    1. 4.468 billion years
    2. 704 million years
    3. 5,730 years
    4. 12 years
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  6. Question 6

    Who discovered radioactivity?
    1. Who discovered radioactivity?
    2. Marie Curie
    3. J.J. Thomson
    4. Henri Becquerel
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  7. Question 7

    The unit of radioactivity ‘Becquerel’ measures:
    1. Number of decays per second
    2. Half-life of an element
    3. Mass defect
    4. Binding energy
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  8. Question 8

    Which law explains that an alpha decay decreases the atomic number by 2 and mass number by 4?
    1. Avogadro’s Law
    2. Law of Conservation of Mass
    3. Soddy-Fajans Displacement Law
    4. Boyle’s Law
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  9. Question 9

    Which of the following has the highest penetrating power?
    1. Alpha rays
    2. Gamma rays
    3. Cathode rays
    4. Beta rays
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  10. Question 10

    Alpha particles are essentially:
    1. Helium nuclei
    2. Neutrons
    3. Protons
    4. Electrons
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  11. Question 11

    Which isotope is used in carbon dating?
    1. Carbon-12
    2. Carbon-13
    3. Carbon-14
    4. Carbon-15
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  12. Question 12

    The half-life of a radioactive element is 2 days. What fraction of the element remains after 6 days?
    1. 1/2
    2. 1/4
    3. 1/8
    4. 1/16
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  13. Question 13

    Which isotope is commonly used in cancer treatment?
    1. Iodine-131
    2. Cobalt-60
    3. Uranium-235
    4. Radium-226
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  14. Question 14

    In nuclear fission, the nucleus splits into:
    1. Two or more lighter nuclei
    2. Two or more lighter nuclei
    3. Neutrons only
    4. Photons
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  15. Question 15

    The fuel used in nuclear reactors is generally:
    1. Thorium
    2. Carbon-14
    3. Plutonium-244
    4. Uranium-235
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  16. Question 16

    Who discovered artificial radioactivity?
    1. Irene Curie and Joliot
    2. Albert Einstein
    3. Ernest Rutherford
    4. Neils Bohr
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  17. Question 17

    Which component is used to slow down neutrons in a nuclear reactor?
    1. Boron
    2. Graphite
    3. Cadmium
    4. Lead
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  18. Question 18

    What is the nature of gamma rays?
    1. Charged particles
    2. Electromagnetic waves
    3. Heavy nuclei
    4. Neutrons
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  19. Question 19

    In a hydrogen bomb, which reaction takes place?
    1. Ionization
    2. Fission
    3. Fusion
    4. None
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  20. Question 20

    Which isotope is used in brain imaging (PET scan)?
    1. Fluorine-18
    2. Sodium-24
    3. Xenon-133
    4. Gallium-67
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