Evolution of Atomic Models Quiz
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Questions and Answers

What did Bohr suggest about the electrons in his model of the atom?

  • Electrons are twice the size of protons.
  • Electrons have a negative charge but no mass.
  • Electrons orbit the nucleus in defined shells. (correct)
  • Electrons are randomly scattered within the nucleus.

    • What is the maximum number of electrons that can occupy the third energy shell in an atom?

  • 18 (correct)
  • 8
  • 2
  • 32

    • What is the mass number of an atom if it contains 20 protons and 22 neutrons?

  • 20
  • 42 (correct)
  • 22
  • 40

    • Which subatomic particle was discovered by James Chadwick?

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

    What does the atomic number of an element represent?

    <p>The number of protons in the nucleus.</p> Signup and view all the answers

    Which model suggested that atoms are made up of a positively charged nucleus surrounded by electrons in specific energy levels?

    <p>Bohr model</p> Signup and view all the answers

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