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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 (A)</p> Signup and view all the answers

How are radionuclides produced artificially?

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

What is the term for unstable nuclei that are radioactive?

<p>Radionuclides (C)</p> Signup and view all the answers

How many known radionuclides are there?

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

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

<p>A neutron deficit (C)</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 (B)</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 (C)</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 (A)</p> Signup and view all the answers

What is the function of a cyclotron in producing radionuclides?

<p>To accelerate positively charged ions (A)</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 (B)</p> Signup and view all the answers

What is the result of neutron absorption by a nucleus?

<p>An increase in mass number (C)</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 (A)</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 (D)</p> Signup and view all the answers

What is unique about the nucleus of ordinary hydrogen?

<p>It consists of a single proton (B)</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 (A)</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 (D)</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 (A)</p> Signup and view all the answers

What is the proportion of stable nuclides in the world?

<p>Nearly all (A)</p> Signup and view all the answers

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