Physical Science Lesson 1.4: Heavy Element Formation
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Questions and Answers

What is the first product formed by fusing two helium-4 nuclei?

  • Oxygen-16
  • Beryllium-8 (correct)
  • Carbon-12
  • Boron-8
  • Why can fusion reactions not produce nuclei heavier than iron-56?

  • The atomic number becomes too high
  • The fusion reactions become unfavorable (correct)
  • The binding energy per nucleon increases
  • The gamma radiation released is insufficient
  • How is a heavier isotope of an element produced in neutron capture?

  • Through emission of gamma radiation
  • By losing a proton
  • By adding a neutron to the seed nucleus (correct)
  • Through alpha decay
  • What process occurs when an unstable isotope undergoes beta decay?

    <p>Increase in atomic number</p> Signup and view all the answers

    Why do different pathways, such as neutron or proton capture, become necessary for the synthesis of heavier nuclei?

    <p>The nuclear binding energy decreases</p> Signup and view all the answers

    What is the main difference between the slow neutron capture (s-process) and the rapid neutron capture (r-process)?

    <p>Rate of neutron capture</p> Signup and view all the answers

    Which process is associated with a supernova based on the information provided?

    <p>Rapid neutron capture (r-process)</p> Signup and view all the answers

    Why is proton capture (p-process) difficult to occur naturally according to the text?

    <p>Strong nuclear force repulsion</p> Signup and view all the answers

    Which type of nucleosynthesis is proton capture (p-process) associated with?

    <p>Supernova nucleosynthesis</p> Signup and view all the answers

    In which scenario does a 0−1β decay almost always occur before another neutron can be captured?

    <p>Slow neutron capture (s-process)</p> Signup and view all the answers

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