Radioactivity and Unstable Nuclei Quiz
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Questions and Answers

Which of the following statements about radioactive isotopes is true?

  • Radioisotopes have a balanced nucleus with an equal number of protons and neutrons.
  • Radioisotopes have an unbalanced nucleus with uneven protons and neutrons. (correct)
  • All isotopes with an atomic number greater than 83 are stable.
  • All radioactive isotopes decay into different atoms through alpha emission.

    • Which of the following is true about stable nuclei?

  • The ratio of neutrons to protons determines the stability of a given nucleus. (correct)
  • Stable nuclei emit subatomic particles and energy to stabilize.
  • Stable nuclei can decay into different atoms through alpha emission.
  • Stable nuclei always have an atomic number greater than 83.

    • What is the process called when an isotope has both too many protons and neutrons and needs to lose mass?

  • Positron emission
  • Gamma radiation
  • Beta decay
  • Alpha decay (correct)

    • Which of the following is true about isotopes above the Band of Stability?

    <p>They go through beta emission to lower the number of neutrons.</p> Signup and view all the answers

    What is the maximum atomic number for stable nuclei?

    <p>83</p> Signup and view all the answers

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