Polarity and Molecular Shape Lab

Objectives:

Construct models of molecule :

• determine molecular shapes
• Predict polarity of molecules
  

Materials:

• Molecular model kit

Procedure :

1. Build a model for each of the molecules listed on the data table on th back of this page.
   (Some atoms can form multiple bonds.)
2. Draw the three dimensional structure of each molecule in table 1. use solid lines to represent bonds in the plane of the paper, dashed lines for bonds that point back from the place of the paper, and wedged lines for bonds that point out from the plane of the paper, and wedged lines for bonds that point out from the plane of the paper toward the viewer.
3. note the shape of each molecule in the third column of table 1, the blond angles in column 4, whether or not they will be polar in column 5 and whether or not they exhibit resonance structure in column 6.

This is the guidelines to the models














This is Si2H6
Polar:No








This CO2
Polar: Yes


















This is C2H4

Polar: No
















This is C3H8

Polar: No

















This is SF6

Polar: Yes






This is N2
Polar: Ionic








This is IF3

Polar: Yes







This is H2O

Polar: Yes


















This is H2O2

Polar: Yes






This is HF

Polar: Yes

This is SiH2O

Polar: No

This is SO3

Polar: Yes

This is SeF4

Polar: Yes

This is CH3NH2

Polar: Yes

This is CH4

Polar: No

In conclusion:
The shape of the Molecular structure is in direct relation to the number of valence electrons in each atom