Learning outcomes - after studying this topic, you should be able to:

• draw out plausible Lewis structures for simple polyatomic molecules
• assign bond orders based on sharing of electron pairs, resonance structures and formal charges
• explain the relationship between resonance and electron delocalisation in molecular orbitals

• Section 5.3 (in Blackman, Bottle, Schmid, Mocerino and Wille, Chemistry, 3^rd Edition, 2015 (John Wiley) )

• Lewis theory of bonding (in ChemWiki)

Lewis structures Tags: bonding | Lewis structures Contributed by Adam Bridgeman

Molecular shape and structure Tags: Lewis structures | molecular shape | VSEPR Contributed by Adam Bridgeman

Applying VSEPR theory Tags: Lewis structures | molecular shape | VSEPR Contributed by Adam Bridgeman

Valence bond model of covalent bonding Tags: bonding | molecular orbitals Contributed by Adam Bridgeman

Lewis structures (interactive structure maker) Description: Interactive approach to building Lewis structures Tags: Lewis structures Contributed by Adam Bridgeman

Oxidation numbers Tags: oxidation numbers Contributed by Adam Bridgeman

Drawing Lewis Structures (short video tutorial) Description: Video tutorial Tags: lewis structures Contributed by Elizabeth New

Drawing the Lewis structure of the sulfate ion Tags: Lewis structure | formal charges Contributed by Alice Williamson

Molecular shape and dipoles (short video tutorial) Description: Video tutorial on how to work out if a molecule is polar or not. Tags: VSEPR | Lewis structures Contributed by Chiara Neto

Shapes and polarity Tags: VSEPR | Lewis structures | polarity Contributed by Adam Bridgeman

Molecular Shapes Interactive Simulation Description: Simulates model and real molecules, both shape and electron arrangement. Contributed by Chiara Neto