- In Table 1, complete the columns. (Remember that the values pertain to the Central atom only.)
- In Table 2, complete the columns. (Remember that the values pertain to the Central atom only.)
- In Table 3 complete the columns. . (Remember that the values pertain to the Central atoms only. In this table, you will have more than one central atom so report more than one value, ie. 3 / 3)
Data:
Table 1 Simple Molecules
Molecule |
CH4 |
NH3 |
H2O |
CCl4 |
NCl3 |
Number of Bond Pairs |
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|
Number of Lone Pairs |
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Number of Electron Domains |
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Molecular Geometry (Shape) |
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Bond Angle |
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Polar or Non-Polar |
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Table 2 Molecules with Multiple Bonds
Molecule |
CH2O |
HCN |
CO2 |
CO |
[NO2]- |
Number of Bond Pairs |
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|
Number of Lone Pairs |
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|
Number of Electron Domains |
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|
Molecular Geometry (Shape) |
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Bond Angle |
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Polar or Non-Polar |
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Table 3 Molecules with Multiple Central Atoms
Molecule |
C2H4 |
H2O2 |
CH3OH |
CH3NH2 |
Number of Bond Pairs |
/ |
/ |
/ |
/ |
Number of Lone Pairs |
/ |
/ |
/ |
/ |
Number of Electron Domains |
/ |
/ |
/ |
/ |
Molecular Geometry (Shape) |
/ |
/ |
/ |
/ |
Bond Angle |
/ |
/ |
/ |
/ |
Polar or Non-Polar |
|
|
|
|
Data Results / Analysis:
- What determines which atoms are the central atoms?
- How do you adjust the number of electrons to form a cation? What about an anion?
- What causes some molecules with the same number of electron domains to have different shapes? Would they cause the real bond angle to be larger or smaller? Why?
- Which of the following elements should you expect to form an incomplete octet: H, He, Be, B, C, O? Why?
- Which of the following elements are good candidates to form an expanded octet: N, F, Ne, P, S, Cl, Ar? Why?
- What things must you consider when determining if a molecule is polar or non-polar?
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