Shapes of molecules

Question 1

What is a linear molecules bond angle?

Answer 1

180 degrees

Question 2

What is a trigonal planar molecules bond angle?

Answer 2

120 degrees

Question 3

What is a tetrahedral molecules bond angle?

Answer 3

109.5 degrees

Question 4

What is a trigonal bipyramidal molecules bond angle?

Answer 4

120 degrees and 90 degrees

Question 5

What is an octahedral molecules bond angle?

Answer 5

90 degrees

Question 6

What is a pyramidal molecules bond angle?

Answer 6

107 degrees

Question 7

What is a non-linear molecules bond angle?

Answer 7

104.5 degrees

Question 8

How do you identify a linear molecule?

Answer 8

2 bonding pairs with no lone pairs

Question 9

How do you identify a trigonal bipyramidal molecule?

Answer 9

5 bonding pairs with no lone pairs

Question 10

How do you identify an octahedral molecule?

Answer 10

6 bonding pairs with no lone pairs

Question 11

How do you identify a trigonal bipyramidal molecule?

Answer 11

5 bonding pairs with no lone pairs

Question 12

What does a wedge mean in a diagram?

Answer 12

The element is going towards me

Question 13

How do you identify a pyramidal molecule?

Answer 13

3 bonding pairs with 1 lone pair

Question 14

How do you identify a non-linear molecule?

Answer 14

2 bonding pairs with 2 lone pairs

Question 15

What does a dashed wedge mean in a diagram?

Answer 15

The element is going away from me (into the paper)

Question 16

What is the affect of the lone pairs on the bonding pairs and the bonding angle?

Answer 16

The lone pairs repel the bond pairs more than the bond pairs repel each other, making the different shapes and reducing the bonding angle. For every lone pair the bonding angle decreases by 2.5 degrees