A Level Chem Effect of lone pairs on the shape of molecules

Are lone pairs stronger then bonding pairs?

Yes they are stronger

What effect does the lone pair have on the shape of a molecule?

It decreases the the degrees of the bond angels in the shape

By how many degrees does the lone pair decrease the bond angel by?

2.5^o

If a lone pair is present in a linear shape what is the resulting bond angel?

177.5

If a lone pair is present in a trigonal planar what is the resulting bond angle?

117.5

If a lone pair is present in a tetrahedral what is the resulting degrees of the shape?

107

What happens when there are two lone pairs in a shape?

The bond angle decreases by 5^o

What is the name given to a tetrahedral with 2 lone pairs?

A non-linear or V-shaped