What's in a Medicine (WM) Bonding and Structure

The Shapes of Molecules

Arrangements of electrons can be represented by a dot and cross diagram.

Shape

Bond pairs

Bond angle

Example

Tetrahedral

4

109°

Methane CH₄

Linear

2

180°

Carbon dioxide CO₂

Planar

3

120°

BF₃

Bipyramidal

5

120°, 90°

Phosphorus pentachloride PCl₅

Octohedral

6

90°

[Ca(H₂O)₆]²⁺   SF₆

The…