Alkenes and their bonding

Question 1

Define Sigma Bonds.

Answer 1

covalent bonds formed when electron orbitals overlap axially (end-on)

Question 2

Define Pi Bonds.

Answer 2

covalent bonds formed when electron orbitals overlap sideways.

Question 3

the main difference between alkanes and alkenes is that alkanes contain

Answer 3

only single bonds

Question 4

alkenes contain at least one

Answer 4

double bond

Question 5

alkenes are much less

Answer 5

common than alkanes

Question 6

the general formula for the alkene homologous series is

Answer 6

CnH2n

Question 7

when drawing the structures of alkenes, you normally show the bonds at angles of

Answer 7

120 degrees

Question 8

true or false: alkenes cannot exist as cyclical structures.

Answer 8

false, a common cyclic alkene is cyclohexene

Question 9

cyclic alkenes have a different………………….to non-cyclic alkenes

Answer 9

general formula

Question 10

the molecular formula of cyclohexene is:

Answer 10

C6H10

Question 11

the double bond in alkenes makes them

Answer 11

more reactive than alkanes

Question 12

using the symbol C=C to show a double bond is misleading because it implies that

Answer 12

the two bonds between the carbon atoms are the same, which they aren’t. Of course.

Question 13

in an alkene molecule, both carbon atoms in the C=C double bond are joined to only

Answer 13

three other atoms

Question 14

electrons can exist in

Answer 14

s orbitals

Question 15

pairs of electrons around an atom can be represented by

Answer 15

a balloon shape