Shapes

Question 1

2 bonding pairs of electrons

Answer 1

Linear
180° bond angle

eg. BeCl2

Question 2

3 bonding pairs of electrons

Answer 2

Trigonal planar
120° bond angle

eg. BF3

Question 3

4 bonding pairs of electrons

Answer 3

Tetrahedral
109.5° bond angle

eg. CH4

Question 4

6 bonding pairs of electrons

Answer 4

Octahedral
90° bond angle

eg. SF6

Question 5

3 bonding pairs of electrons & 1 lone pair of electrons

Answer 5

Pyramidal
107° bond angle

eg. NH3

Question 6

2 bonding pairs of electrons & 2 lone pairs of electrons

Answer 6

Non-linear
104.5° bond angle

eg. H2O

Question 7

Double bonds

Answer 7

Treat same as single bonds

Called bonding regions

Question 8

Explaining shape

Answer 8

1. State no. bonding pairs
   & no. lone pairs
2. State electron pairs repel
   as far away as possible
   but lone pairs repel further