chem #6

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Author:
dee3215
ID:
16905
Filename:
chem #6
Updated:
2010-04-30 00:16:48
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Description:
lewis dot symbols
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  1. The lewis dot symbol for the S2- ion is
    S (8 dots) 2-
  2. Which of these compounds is most likely to be ionic?
    KF
  3. Which of these compounds is most likely to be covalent?
    SF4
  4. Select the strongest bond in the following group
    C--- (triple bond) N
  5. The total number of lone pairs in NCl3 is
    10
  6. The lewis structure for CS2 is?
    ..S.. = C = ..S..
  7. Select the correct lewis structure for nitrogen trifluoride, NF3.
    look over the test
  8. the formal charge on the sulfur atom in the resonance structure of sulfur dioxide which has one single bond and one double bond is
    +1

    • 6-2-1/2(6)
    • 6-2-3
    • +1
  9. Which of these elements is most likely to exhibit an expanded octet in its compounds?
    S
  10. Lewis theorized the octet rule to describe chemical bonding where atoms lose, gain, or share electrons in order to achieve a noble gas configuration
    True
  11. according to the VSEPR theory, the shape of the SO3 molecule is
    Trigonal planar
  12. What is the molecular shape of the CH4 molecule
    Tetrahedral
  13. What is the molecular shape of the H2O molecule?
    bent
  14. According to the VSEPR theory, the molecular shape of ammonia is
    Trigonal pyrimidal
  15. What is the molecular shape of SiF6 2- as predicted by the VSEPR theory?
    Octahedral
  16. What is the approximate bond angle for CCl4?
    109.5
  17. What is the approximate bond angle for NH3?
    107 exception
  18. Indicate the type of hybrid orbitals used by the central atom in CCl4
    sp3
  19. Indicate the type of hybrid orbitals used by the central atom in SF6
    sp3d2
  20. Determine the shape of PCl3 and then decide on the approximate hybridization of phosphorus in this molecule. (phosphorus is the central atom)
    sp3
  21. The number of pi bonds in the molecule
    H H
    _ _
    H-C=-C-C-C-C=-C-H
    _ _
    H H
    4
  22. According to molecular orbital theory, the twelve outermost electrons in the o2 molecule are distributed as follows:
    8 in bonding MOS, 4 in antibonding MOS
  23. Indicate the type of hybrid orbitals used by the central atom in PCl3
    sp3
  24. How many bonds should a fluorine atom form?
    1

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