PROCEDURE FOR TABLE ON PAGE 8-7
For the substances listed in the table on page 8-7, draw correct Lewis structures. From the Lewis structures make three-dimensional models using styrofoam balls for the cores of the atoms and toothpicks for the electron pairs. Obtain your instructor's initials on your data page after he/she has checked your models. Once you have had your styrofoam models checked, use the plastic model kits to construct a three-dimensional model of each substance. Using the plastic models, fill in all the lines of the data table on Page 8-7. Do not completely dismantle the plastic models, they may be useful in making models for the second part of this exercise.

Remember, the molecular geometry can be predicted directly from the Lewis structures for the substances on Page 8-7. That is, the name of the molecular geometry is the same as the name of the electron pair geometry. This is not always the case, as you will see in the next section.

PROCEDURE FOR TABLE ON PAGE 8-13
For the substances listed in the table on page 8-13, draw correct Lewis structures. From the Lewis structures make three-dimensional models using styrofoam balls for the cores of the atoms and toothpicks for the electron pairs. Pay special attention to electron pair interactions, especially lone pair-lone pair interactions, when deciding where to place the lone pairs. Obtain your instructor's initials on your data page after he/she has checked your models. Once you have had your styrofoam models checked, use the plastic model kits to construct a three-dimensional model of each substance. Using the plastic models, fill in all the lines of the data table on Page 8-13.