Atomic Shape and Structure

Question 1

What electron pairs repel the most?

Answer 1

lone + lone -> lone + bonding -> bonding + bonding

Question 2

How is the shape of a molecule affected by electron pairs?

Answer 2

• If all are bonded then the shape is symmetrical.

- For each lone pair, it distorts by 2.5º

Question 3

How many bonded and lone pairs in a tetrahedral shape? Bond angle?

Answer 3

4 bonded
0 lone
109.5º

Question 4

How many bonded and lone pairs in pyramidal shape? Bond angle?

Answer 4

3 bonded
1 lone
107º

Question 5

How many bonded and lone pairs in non-linear? Bond angle?

Answer 5

2 bonded
2 lone
104.5º

Question 6

How many bonded and lone pairs in octahedral? Bond angle?

Answer 6

6 bonded
0 lone
90º

Question 7

How many bonded and lone pairs in a trigonal planar? Bond angle?

Answer 7

3 bonded
0 lone
120º

Question 8

How many bonded and lone pairs in a trigonal bipyramidal? Bond angles?

Answer 8

5 bonded
0 lone
120º and 90º

Question 9

What are the modifications of the octahedral shape? 1LP, 2LP, 3LP, 4LP?

Answer 9

1 LP = umbrella
2 LP = Square planar
3 LP = T-Shape
4 LP = Linear