Exploring the Evolution of the Periodic Table
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Questions and Answers

Which classification method did Dobereiner use to group elements?

  • Number of protons
  • Atomic weights (correct)
  • Chemical properties
  • Physical properties

    • What is the defining characteristic of a triad according to Dobereiner?

  • Similar physical properties
  • Similar number of protons
  • Similar atomic weights
  • Similar chemical properties (correct)

    • What is the atomic weight of the middle element in the Iron-Cobalt-Nickel triad?

  • 58.71 (correct)
  • Not provided
  • 58.93
  • 55.85

    • Which elements form the Chlorine-Bromine-Iodine triad?

    <p>Chlorine, Bromine, Iodine</p> Signup and view all the answers

    What is the atomic weight of Sodium?

    <p>23</p> Signup and view all the answers

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