Chemical Bonding

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Chemical Bonding

• Why do atoms stick together, anyway?

Who cares?
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Types of Bonding

• Ionic
• Covalent
• Metallic

Ionic Bonding
Covalent Bonding
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(No Transcript)
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Covalent Bonding Uses Valence Electrons
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Also called Lewis Dot Symbols
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How many valence electrons does a Si atom have?

1. 1
2. 2
3. 3
4. 4
5. 5
6. 6
7. 7
8. 8

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Lewis Electron-Dot StructuresDescribing Bonding
in p-block compounds
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Interpreting Lewis Structures
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Drawing your own Lewis Structures
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How many total bonding electrons does an acetate
ion have?

• 1. 3.5
• 7
• 8
• 10
• 12
• 13
• 14
• 15

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Why bother?
Resonance
Number of Bonds
Molecular Structure
Reactivity
Lewis Structure
Polarity
Physical State and Properties
Spectroscopy
Hydrophilicity and phobicity
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Back to Drawing Lewis Structures
I have an idea.
Do what I say.
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Back to Drawing Lewis Structures
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Examples
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Examples with multiple bonds
N2
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Examples Exceptions to the Octet Rule
ClF5
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Examples Reading Organic Structures
CH3CH3
CH3CN
CHCCHCH2
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Draw the Lewis structure for SO3. How many lone
pairs does it have?

1. 1
2. 2
3. 3
4. 4
5. 0

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

1. 1
2. 2
3. 3
4. 4
5. 0