aim: how do chemists use molecular geometry to predict polarity? metallic bonding polarity of water...
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Aim: How do chemists use molecular geometry to predict polarity?
• Metallic bonding• Polarity of water and "hydrogen bonding“• Water
Aim: How do chemists use molecular geometry to predict polarity?
How to name covalent compounds?Use prefixes to note the number of each type of
atom: mono-, di-, tri-, tetra-, penta-, hexa-, hepta-, octa-, nona-, deca-
Aim: How do chemists use molecular geometry to predict polarity?
• VSEPR (Valence Shell Electron Pair Repulsion) theory- a model that can be used to predict shape of a molecule based on repulsion of both bonding and nonbonding electron pairs.
• Challenge: Use VSEPR theory explain why carbon dioxide (CO2) has a linear shape while hydrogen sulfide (H2S) is bent.
Aim: How do chemists use molecular geometry to predict polarity?
• Describe the properties of ionic compounds, molecular substances, and metallic solids.
• Why do ionic compounds generally have higher melting and boiling points than molecular substances?
• Why are metals (with metallic bonds) good conductors of heat and electricity?
• Ionic compounds do not conduct electricity in the solid phase but do conduct electricity in the liquid phase or when dissolved. Explain.
Aim: How do chemists use molecular geometry to predict polarity?
Do Now: Draw the Lewis structure for water and describe its shape.
• Why is water polar?• Describe and draw/build four examples of polar
molecules.• Why is methane non-polar?• Describe and draw/build three examples of non-polar
molecules.• Challenge: Use VSEPR theory explain why carbon dioxide
(CO2) has a linear shape while hydrogen sulfide (H2S) is bent.