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Questions and Answers

What is the main characteristic that distinguishes isotopes of an element?

  • Different number of neutrons (correct)
  • Different chemical properties
  • Different position in the periodic table
  • Different number of protons

    • Which of the following isotopes is stable?

  • Carbon-10
  • Carbon-14
  • Carbon-12 (correct)
  • Carbon-11

    • What happens to unstable nuclei?

  • They merge with other nuclei to become stable
  • They remain unstable forever
  • They become stable without emitting radiation
  • They emit alpha, beta, and gamma radiation to become stable (correct)

    • What is the source of radionuclides used in medical imaging?

    <p>Artificial production in nuclear reactors</p> Signup and view all the answers

    How are radionuclides produced artificially?

    <p>By adding neutrons to a stable nucleus</p> Signup and view all the answers

    What is the term for unstable nuclei that are radioactive?

    <p>Radionuclides</p> Signup and view all the answers

    How many known radionuclides are there?

    <p>Over 2700</p> Signup and view all the answers

    What happens to the mass of a nucleus when a neutron is absorbed?

    <p>It is increased by one</p> Signup and view all the answers

    What is the result of forcing an additional proton into a stable nucleus?

    <p>A neutron deficit</p> Signup and view all the answers

    What is the purpose of a medical minicyclotron?

    <p>To produce short-lived radionuclides at or near the hospital site</p> Signup and view all the answers

    What is the typical half-life of radionuclides produced in a cyclotron?

    <p>Less than a minute to a couple of hours</p> Signup and view all the answers

    What is the outcome of the reaction 18O +p→ 18F +n?

    <p>The atomic number of oxygen has increased by one to become fluorine</p> Signup and view all the answers

    What is the function of a cyclotron in producing radionuclides?

    <p>To accelerate positively charged ions</p> Signup and view all the answers

    What happens to the atomic number of a nucleus when a proton is forced into it?

    <p>It increases by one</p> Signup and view all the answers

    What is the result of neutron absorption by a nucleus?

    <p>An increase in mass number</p> Signup and view all the answers

    What is the origin of diagnostic imaging technologies used in nuclear medicine?

    <p>A combination of Röntgen's and Becquerel's discoveries</p> Signup and view all the answers

    What is the primary reason for the development of new technologies in nuclear medicine?

    <p>To improve patient care</p> Signup and view all the answers

    What is unique about the nucleus of ordinary hydrogen?

    <p>It consists of a single proton</p> Signup and view all the answers

    What is the characteristic of stable lighter nuclei?

    <p>They have nearly equal numbers of protons and neutrons</p> Signup and view all the answers

    What is the necessary condition for practicing nuclear medicine safely?

    <p>Having a clear understanding of radiation principles</p> Signup and view all the answers

    What has been the trend in nuclear medicine over the last century?

    <p>An increase in innovation each decade</p> Signup and view all the answers

    What is the proportion of stable nuclides in the world?

    <p>Nearly all</p> Signup and view all the answers

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