Properties of Alkenes (13.1)

Question 1

What kind of molecule is an alkene?

Answer 1

Hydrocarbon

Question 2

An alkene has at one carbon = carbon double bond. What kind of hydrocarbon are they?

Answer 2

Unsaturated Hydrocarbons

Question 3

What is the general formula for aliphatic alkenes with C=C bond?

Answer 3

Cn+2n

Question 4

How many electrons does carbon have in it’s highest energy level?

Answer 4

Four

Question 5

How are pi covalent bonds formed?

Answer 5

The sideways overlap of two p-orbitals from each carbon atom in the double bond.

Question 6

Why do pi bonds prevent the rotation of carbon atoms in an alkene?

Answer 6

The pi-electron density is concentrated above and below the line joining their nucleuses together.

((the pi bond is above and below the atoms.))

Question 7

What is the shape around the C=C double bond?

Answer 7

Trigonal Planar

Question 8

What are the differences between a sigma bond and a pi bond?

Answer 8

-Pi bonds occur in double bonds while Sigma bonds occur in single covalent bonds

-Pi bonds restrict rotation while Sigma bonds do not

• Sigma bonds only occur in the middle of the C-C bonds while Pi bonds are horizontally above and below the C=C atoms

-Pi bonds are stronger

Question 9

What would alkene’s with one double bond suffix be?

Answer 9

-ene

Question 10

What would an alkene with three double bond’s suffix be?

Answer 10

-triene