Why do atoms stick together?

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Presentation transcript:

Why do atoms stick together? Chemical Bonding Why do atoms stick together? Who cares?

Types of Bonding Ionic Covalent Metallic Ionic Bonding: Covalent Bonding:

Covalent Bonding Uses Valence Electrons

Also called Lewis Dot Symbols

How many valence electrons does a Si atom have? 1 2 3 4 5 6 7 8

Lewis Electron-Dot Structures: Describing Bonding in p-block compounds

Interpreting Lewis Structures

Drawing your own Lewis Structures

How many total bonding electrons does an acetate ion have? 1. 3.5 7 8 10 12 13 14 15

Why bother? Lewis Structure Resonance Number of Bonds Molecular Reactivity Lewis Structure Polarity Physical State and Properties Spectroscopy Hydrophilicity and phobicity

Back to Drawing Lewis Structures I have an idea. Do what I say.

Back to Drawing Lewis Structures

Examples

Examples with multiple bonds

Examples: Exceptions to the Octet Rule ClF5

Examples: Reading Organic Structures CH3CH3 CH3CN CHCCHCH2

Draw the Lewis structure for SO3. How many lone pairs does it have? 1 2 3 4

Draw the Lewis structure for NO2-. How many lone pairs does it have? 1 2 3 4

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