Atomic Chemistry 101
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Questions and Answers

Which of the following particles make up the nucleus of an atom?

  • Protons and electrons
  • Protons, neutrons, and electrons
  • Protons and neutrons (correct)
  • Neutrons and electrons

    • What distinguishes one chemical element from another?

  • The number of protons and neutrons
  • The number of neutrons
  • The number of protons (correct)
  • The number of electrons

    • What defines the isotope of an element?

  • The number of electrons
  • The number of protons
  • The number of protons and electrons
  • The number of neutrons (correct)

    • Why can't humans see atoms with conventional microscopes?

    <p>Atoms are too small</p> Signup and view all the answers

    What percentage of an atom's mass is located in the nucleus?

    <p>99.94%</p> Signup and view all the answers

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