Depending on the room you are in, you either will do the experiment using the plastic model kits mentioned in the lab manual, or you will forego the model kits and use some molecular visualization software we will install on computers in the lab. Instruction in the use of the special software will be provided by the TAs. The goal of this exercise is to aid you in seeing molecules in three dimensions, one of the most important skills you can learn in chemistry. You lose a great deal if you bypass the model step. For each molecule you should record in your lab notebook the number of bonding electron pairs the number of nonbonding electron pairs a sketch of the molecule whether the molecule is polar or nonpolar the electron pair geometry the molecular geometry.
Precautions Look both ways before crossing the street on the way to class.
If you work with the plastic model kits, try to avoid swallowing any small parts. If you work instead with the computers, avoid sticking your finger in the electrical sockets.