Periodic Table and Chemical Elements Quiz
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Questions and Answers

What is the purpose of arranging the chemical elements in the periodic table?

  • To group elements based on their chemical reactivity
  • To organize elements based on their atomic numbers (correct)
  • To arrange elements according to their atomic masses
  • To separate elements based on their physical states
  • Which characteristic increases as one moves down a group in the periodic table?

  • Nonmetallic character
  • Atomic mass
  • Metallic character (correct)
  • Chemical reactivity
  • What did Dmitri Mendeleev use to predict some properties of the missing elements in his periodic table?

  • Chemical reactivity
  • Atomic number
  • Atomic mass (correct)
  • Physical state
  • Which scientist formulated the first generally accepted periodic table in 1869?

    <p>Dmitri Mendeleev</p> Signup and view all the answers

    In which direction does nonmetallic character increase on the periodic table?

    <p>From the bottom left to the top right</p> Signup and view all the answers

    What is a fundamental discovery recognized in the late 19th century related to the periodic table?

    <p>The periodic law</p> Signup and view all the answers

    What is the unique identifier for each chemical element?

    <p>Proton number</p> Signup and view all the answers

    Which scientist's discovery led to the recognition that the actinides were f-block rather than d-block elements?

    <p>Glenn T. Seaborg</p> Signup and view all the answers

    What are variants with the same number of protons but different numbers of neutrons called?

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

    In the periodic table, elements with similar chemical properties generally fall into the same ____________.

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

    What is usually the weighted average of naturally occurring isotopes when it is shown for an element?

    <p>Atomic mass</p> Signup and view all the answers

    What determines the start of a new row (period) in the standard periodic table?

    <p>Electron configuration</p> Signup and view all the answers

    What is the term for the number of protons in an element's nucleus?

    <p>Proton number</p> Signup and view all the answers

    Which group do elements with the same number of electrons in a particular subshell fall into in the periodic table?

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

    What determines the columns (groups) in the periodic table?

    <p>Electron configuration</p> Signup and view all the answers

    What did Glenn T. Seaborg's discovery lead to regarding the position of actinides in the periodic table?

    <p>f-block rather than d-block elements</p> Signup and view all the answers

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