Shapes Of Molecules

Question 1

What two things can change the shape of a molocule?

Answer 1

-Total number of bonding pairs and lone pairs around the central atom.

Question 2

How much further do lone pairs repel from the other electron pairs than bonding pairs?

Answer 2

2-2.5 degrees.

Question 3

How do you work out the number of bonding pairs and lone pairs in a molocule?

Answer 3

-find group number of the cetral atom.
-Add the group number and number of bonds and then take away the charge to get the number of electrons.
-Divide the number of electrons by 2 to find the pairs of electrons.
-Take away the pairs of electrons from the number of bond pairs to find the number of lone pairs.

Question 4

How many bond pairs and lone pairs does a linear shaped molecule have?
What is the bond angle?

Answer 4

-2 bonding pairs
-0 lone pairs
-Bond angle=180

Question 5

How many lone pairs and bond pairs does a trigonal planar have?
What is the bond angle?

Answer 5

-3 bonding pairs
-0 lone pairs
-Bond angle=120

Question 6

How many bond pairs and lone pairs does a tetrahedral shaped molecule have?
What is the bond angles?

Answer 6

-4 bond pairs
-0 lone pairs
-Bond angle= 109.5

Question 7

How many bond pairs and lone pairs does a trigonal pyramidal have?
-What is the bond angle?

Answer 7

-3 bond pairs
-1 lone pair
-Bond angle= 107

Question 8

How many bond pairs and lone pairs does a bent shaped molecule have?
What is the bond angle?

Answer 8

-2 bond pairs
-2 lone pairs
-Bond angle=104.5

Question 9

How many lone pairs and bond pairs does a trigonal bipyramidal have?
What is the bond angles?

Answer 9

-5 bond pairs
-0 lone pairs
-Bond angles=120 and 90

Question 10

How many lone pairs and bond pairs does a octahedral shaped molecule have?
What is the bond angle?

Answer 10

-6 bond pairs
-0 lone pairs
-Bond angle=90