Periodic Trends (ps 26)

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Chemical Element Quizzes & Trivia

Chapter 7


Questions and Answers
  • 1. 
    Which describes the behavior of potassium metal during a chemical reaction? I. Neutral atoms become ions with a 1+ charge. II. Neutral atoms take on protons III. Neutral atoms become ions with a corresponding increase in radius.
    • A. 

      I only

    • B. 

      I and II only

    • C. 

      III only

    • D. 

      II and III only

    • E. 

      I, II, and III

  • 2. 
    Which of the following groups has the species correctly listed in order of increasing radius?
    • A. 
    • B. 
    • C. 

      Br-, Cl-, F-

    • D. 

      Na, Mg, Al

    • E. 

      Fe, Fe2+, Fe3+

  • 3. 
    Choose the ion with the largest atomic radius.
    • A. 

      F-

    • B. 

      Al3+

    • C. 

      K+

    • D. 

      O2-

    • E. 

      I-

  • 4. 
    In general, atomic radii decrease from left to right across a period.  The main reason for this behavior is
    • A. 

      The number of neutrons in the nucleus increases

    • B. 

      The number of electrons increases

    • C. 

      The atomic mass increases

    • D. 

      The effective nuclear charge increases

    • E. 

      The polarizability increases

  • 5. 
    The following ionization energies are reported for element X.  (All values are in kJ/mol.) First:           500 Second:   4560 Third:        6910 Fourth:      9540 Fifth:       13400 Based on the above infomation, the most likely identify of X is
    • A. 

      Mg

    • B. 

      Cl

    • C. 

      Al

    • D. 

      Na

    • E. 

      Si