5 Steps to a 5 AP Chemistry

Bonding  153

Total
Electron
Pairs

2 2 Linear

Trigonal planar

Bent

Tetrahedral

Trigonal pyramidal

Bent

Trigonal bipyramidal

Irregular tetrahedral

(see-saw)

T-shaped

Linear

Octahedral

Square pyramidal

Square planar

0

30

21

40

50

41

32

23

60

51

42

31

22

3

4

5

6

Electron-

Group

Geometry

Bonding

Pairs

Nonbonding

Pairs

(Lone Pairs)

Molecular

Geometry

BA B

Linear

Trigonal planar

Tetrahedral

Trigonal

bipyramidal

Octahedral

BAB

B

A B

B

B A

B B

B

B A

B B

A

B

B

A

B

B

B

B

A

B

B

B

B

B

A

B

B

B

A

B

B

A

B

B

B B

B

A B

B B

B

A

B

B

B

B B

B

Figure 11.5 Electron-group and molecular geometry.