Chapter 30: Nuclear Physics And Radioactivity

73 Questions | Total Attempts: 1823

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Chapter 30: Nuclear Physics And Radioactivity - Quiz

Questions and Answers
  • 1. 
    Which of the atomic particles has the least mass?
    • A. 

      Electron

    • B. 

      Proton

    • C. 

      Neutron

    • D. 

      Nucleon

  • 2. 
    The mass of an atom is
    • A. 

      Approximately equally divided between neutrons, protons, and electrons

    • B. 

      Evenly divided between the nucleus and the surrounding electron cloud

    • C. 

      Concentrated in the cloud of electrons surrounding the nucleus

    • D. 

      Concentrated in the nucleus

  • 3. 
    The hydrogen nucleus consists of
    • A. 

      A single proton

    • B. 

      A single neutron

    • C. 

      One proton and one neutron

    • D. 

      One proton and two neutrons

  • 4. 
    An atom's atomic number is determined by the number of
    • A. 

      Neutrons in its nucleus

    • B. 

      Nucleons in its nucleus

    • C. 

      Protons in its nucleus

    • D. 

      Alpha particles in its nucleus

  • 5. 
    An atom's mass number is determined by the number of
    • A. 

      Neutrons in its nucleus

    • B. 

      Nucleons in its nucleus

    • C. 

      Protons in its nucleus

    • D. 

      Alpha particles in its nucleus

  • 6. 
    If an atom's atomic number is given by Z, its atomic mass by A, and its neutron number by N, which of the following is correct?
    • A. 

      N = A + Z

    • B. 

      N = Z - A

    • C. 

      N = A - Z

    • D. 

      None of the given answers

  • 7. 
    When a neutron is emitted from an unstable nucleus, the atomic mass number of the nucleus
    • A. 

      Increases by 1

    • B. 

      Decreases by 1

    • C. 

      Does not change

    • D. 

      None of the given answers

  • 8. 
    The number of protons in an atom is
    • A. 

      Zero

    • B. 

      Equal to the number of neutrons

    • C. 

      Equal to the number of electrons

    • D. 

      The same for all elements

  • 9. 
    There is a limit to the size of a stable nucleus because of
    • A. 

      The limited range of the strong nuclear force

    • B. 

      The weakness of the electrostatic force

    • C. 

      The weakness of the gravitational force

    • D. 

      None of the given answers

  • 10. 
    Atoms with the same atomic number but with different numbers of neutrons are referred to as
    • A. 

      Nucleons

    • B. 

      Nuclides

    • C. 

      Isotopes

    • D. 

      None of the given answers

  • 11. 
    Isotopes of an element have nuclei with
    • A. 

      The same number of protons, but different numbers of neutrons

    • B. 

      The same number of protons, and the same number of neutrons

    • C. 

      A different number of protons, and a different number of neutrons

    • D. 

      A different number of protons, and the same number of neutrons

  • 12. 
    The atomic mass unit is defined as
    • A. 

      The mass of a proton

    • B. 

      The mass of an electron

    • C. 

      The mass of a hydrogen-1 atom

    • D. 

      One twelfth the mass of a carbon-12 atom

  • 13. 
    Compared to the masses of its separate protons and neutrons, the total mass of a stable nucleus is always
    • A. 

      Less

    • B. 

      The same

    • C. 

      Greater

    • D. 

      Zero

  • 14. 
    When nucleons join to form a stable nucleus, energy is
    • A. 

      Destroyed

    • B. 

      Absorbed

    • C. 

      Released

    • D. 

      Not transferred

  • 15. 
    The binding energy of a nucleus is contributed to
    • A. 

      Radioactivity

    • B. 

      Alpha decay

    • C. 

      Too many neutrons

    • D. 

      Mass defect

  • 16. 
    The binding energy per nucleon is
    • A. 

      Directly proportional to atomic number

    • B. 

      Inversely proportional to atomic number

    • C. 

      The same for all atoms

    • D. 

      None of the given answers

  • 17. 
    The binding energy per nucleon
    • A. 

      Increases steadily as we go to heavier elements

    • B. 

      Decreases steadily as we go to heavier elements

    • C. 

      Is approximately constant throughout the periodic table, except for very light nuclei

    • D. 

      Has a maximum near iron in the periodic table

  • 18. 
    Which of the following statements concerning the nuclear force is false?
    • A. 

      The nuclear force is very short-ranged

    • B. 

      The nuclear force is very weak and much smaller in relative magnitude than the electrostatic and gravitational forces

    • C. 

      The nuclear force is attractive and not repulsive

    • D. 

      The nuclear force acts on both protons and neutrons

  • 19. 
    Compared to the electrostatic force, the nuclear force between adjacent protons in a nucleus is
    • A. 

      Much weaker

    • B. 

      About the same size

    • C. 

      Only slightly larger

    • D. 

      Much larger

  • 20. 
    Alpha rays can penetrate
    • A. 

      Air only

    • B. 

      A piece of paper

    • C. 

      Several millimeters of aluminum

    • D. 

      Several centimeters of lead

  • 21. 
    Beta rays can penetrate
    • A. 

      Air only

    • B. 

      A piece of paper

    • C. 

      Several millimeters of aluminum

    • D. 

      Several centimeters of lead

  • 22. 
    Gamma rays can penetrate
    • A. 

      Air only

    • B. 

      A piece of paper

    • C. 

      Several millimeters of aluminum

    • D. 

      Several centimeters of lead

  • 23. 
    An α particle is also known as
    • A. 

      An electron

    • B. 

      A positron

    • C. 

      Helium nucleus

    • D. 

      A photon

  • 24. 
    A ß- particle is also known as
    • A. 

      An electron

    • B. 

      A positron

    • C. 

      A helium nucleus

    • D. 

      A photon

  • 25. 
    A ß+ particle is also known as
    • A. 

      An electron

    • B. 

      A positron

    • C. 

      A helium nucleus

    • D. 

      A photon

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