1. C₂H₄Cl₂ a.) Draw the structures and name all of the possible isomers. Are all five H-atoms of C₂H₅Cl equivalent? b.) Are any of these isomers geometric? Why or why not?

2. C₄H₁₀ (straight chain) a.) How many different straight chain models could you build?

3. C₅H₁₂ (isomers) a.) Now make a C₅H₁₂ molecule by replacing one of the H-atoms of C₄H₁₀ with a -CH₃ group? Draw the models and name them. b.) Therefore, how many sets of equivalent H-atoms are there in C₄H₁₀ (straight chain)? Indicate them by using some kind of a code. Use A and B for the different H-atoms. Can you make another C₅H₁₂ structure, draw and name it.

4. C₂H₄ a.) What is the shape of each C? b.) What is the bond angle around each C atom? c.) Does each carbon have the same hybrid type? specify them d.) s there free rotation around the C-C bond?

5. C₂H₂Cl₂ a.) What is the shape of this molecule around each carbon? b.) Draw and name all of the possible isomers, are any of the isomers geometric isomers? c.) What two designations are used for geometric isomers?

6. CH₃-CC-H a.) What is the CC bond angle equal to? b.) What is the hybrid type of triply bonded carbon? c.) What is the shape around each triply bonded carbon? d.) What is the hybridization of carbon in the CH₃ group?