6.0 Introduction To The Periodic Table. Please Have Your Periodic Table Out When Answering These Questions.

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6.0 Introduction To The Periodic Table. Please Have Your Periodic Table Out When Answering These Questions.

Introduction to the periodic tableThe universe is, as far as we know, composed of approximately 120 elements. These are pure substances with a fixed number of protons: hydrogen has 1, helium 2, carbon 6 etc. It seems reasonable to expect some sort of organization to them. That is what the current periodic table is about: trying to show how the elements in the universe are organized. In a functional mannerAufbau ruleThe electrons generally arrange themselves in a pattern shown below Electron ConfigurationPattern: s2 p6 d10 f14 g18


Questions and Answers
  • 1. 
    I have read the introduction to the periodic table, and noted that the most common form of the periodic table lacks symmetry.
    • A. 

      Yes, I have.

    • B. 

      No, I have not

  • 2. 
    Looking at common form of the periodic table, see two big rows of elements separated at the bottom. What do these elements have in common?
    • A. 

      They are the only elements on the periodic table that have an electron configuration that ends in "f". These are the f block elements.

    • B. 

      They all are radioactive; these are the radioactive elements.

    • C. 

      They all have unfilled inner shells, leading to unpredictable chemical behavior. These may be though of as the unpredictable elements.

    • D. 

      They all have been discovered in the last fifty years; these are the recently discovered elements

  • 3. 
    Looking at the common form of the periodic table, we see that the bottom two rows on the periodic table seem to be completely separate. Why are they placed in such a unique place?
    • A. 

      Because they are all so unstable that they are treated separately.

    • B. 

      To give the periodic table a more convenient rectangular shape. If they were placed in chronological order it would make the periodic table much wider.

    • C. 

      By doing this the valence pattern is maintained. Looking down any column. For example ytterbium (Yb) has six valence electrons, and so is placed in the same column as oxygen.

    • D. 

      Purely for historical reasons. They were all discovered recently and so are placed there because there is nowhere else to place them- all other positions are occupied.

  • 4. 
    Which of the following observed electron configurations does not violate the aufbau principle?
    • A. 

      1s^2 2s^2 2p^6 3s^2 3d^10 3p^6 4s^2 4p^6

    • B. 

      1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 4d^10 4p^6

    • C. 

      1s^2 2s^2 2p^4 3s^2 3p^6 4s^2 3d^10 4p^4

    • D. 

      None of the above

  • 5. 
    The element with an ending electron configuration of 7p6 is 
    • A. 

      120

    • B. 

      118

    • C. 

      86

    • D. 

      156

  • 6. 
    Element Uuo has ____ protons
    • A. 

      103

    • B. 

      113

    • C. 

      118

    • D. 

      124

  • 7. 
    The temporarily named element octhexseptium has ___ electrons. 
    • A. 

      867

    • B. 

      789

    • C. 

      675

    • D. 

      786

  • 8. 
    The electron dot structure of carbon predicts it will form ____bonds, and the electron configuration (without modifying it or "hybridizing" it) predicts it will form ___ bonds
    • A. 

      0, 4

    • B. 

      2,4

    • C. 

      4,3

    • D. 

      4, 2

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