Honors Chemistry: Alkenes Exercise
Name
Topic: Alkenes, Structural Isomers and Organic Nomenclature.
Materials: Molecular Model Kits
Procedure:
You will use a molecular model kit to construct several alkanes. The black balls represent
carbon and therefore have 4 holes to form bonds; the white balls represent hydrogen and have 1
hole. Follow the instructions for each part and make sure to have your instructor initial your
paper for each of the structures you build.
1. Build and draw dash structures for each of the following:
a. propene and propane
What similarities and differences can you identify between these two molecules?
Try rotating the bonds, what do you notice?
b. 2-butene
c. 3-methyl-1-pentene
2. Construct, draw dash structures for, and name two structural isomers of C5H10.
Honors Chemistry: Alkenes Exercise
Name
Questions:
1. The molecular formulas for the first few alkenes are as follows:
Ethene
C2H4
Propene
C3H6
Butene
C4H8
Think about the relationship between the number of carbons and the number of hydrogens and
determine the molecular formula for:
a. an alkene with 20 carbon atoms
b. an alkene with 100 hydrogen atoms
2. Fill-in the missing spaces in the table below.
Name
A
Dash
Line-angle
Structure
Structure
3-hexene
B
C
3-ethyl-2-hexene
H
H
H
H
H
C
C
C
C
C
H
H
C
H
H
H
D
H
H
C
H
H
H