Periodic Table and Dobereiner's Triads
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Questions and Answers

Which scientist is credited with creating the Periodic Table?

  • Johann Wolfgang Goethe
  • Dr Kehkashan Jabeen
  • Dmitri Mendeleev (correct)
  • Johann Wolfgang Dobereiner

    • What is the main purpose of the Periodic Table?

  • To classify elements based on their physical states
  • To group elements with similar properties
  • To organize elements by atomic mass (correct)
  • To show all known elements in the universe

    • What did Johann Wolfgang Dobereiner observe about elements?

  • Elements can be grouped into triads with similar properties (correct)
  • Elements can be classified based on their physical states
  • Elements can be organized based on their chemical properties
  • Elements can be classified based on their atomic masses

    • What did Dobereiner's law of triads state?

    <p>The atomic mass of the second element in a triad is approximately equal to the average of the atomic masses of the first and third elements</p> Signup and view all the answers

    What led to the obsolescence of Dobereiner's triads?

    <p>The discovery of new elements</p> Signup and view all the answers

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