Lewis Structures and Molecular Geometry

What are resonance structures? Provide an example.

• Resonance structures are different molecular structures that can be drawn by changing the positions of atoms.

• Resonance structures are different Lewis structures that can be drawn for a molecule or ion by moving electrons.

• Resonance structures are isomers of a molecule that have different physical properties.

• Resonance structures are molecules that have the same Lewis structure but different molecular formulas.

What is the molecular geometry of water (H2O)?

• bent

• trigonal planar

• tetrahedral

• linear

Predict the bond angles in ammonia (NH3).

• 90 degrees

• 120 degrees

• 107 degrees

• 180 degrees

What is the molecular geometry of carbon dioxide (CO2)?

• trigonal planar

• tetrahedral

• linear

• bent

Predict the bond angles in methane (CH4).

• 109.5 degrees

• 180 degrees

• 120 degrees

• 90 degrees

What is the VSEPR theory and how does it help determine molecular geometry?

• The VSEPR theory is a model used in chemistry to predict the boiling point of molecules by considering the repulsion between electron pairs in the valence shell of an atom.

• The VSEPR theory is a model used in chemistry to predict the size of molecules by considering the repulsion between electron pairs in the valence shell of an atom.

• The VSEPR theory is a model used in chemistry to predict the color of molecules by considering the repulsion between electron pairs in the valence shell of an atom.

• The VSEPR theory is a model used in chemistry to predict the shape of molecules by considering the repulsion between electron pairs in the valence shell of an atom.

What is the molecular geometry of ammonia (NH3)?

• trigonal pyramidal

• linear

• tetrahedral

• bent

What is the molecular geometry of carbon monoxide (CO)?

• linear

• bent

• trigonal planar

• tetrahedral

What is the molecular geometry of methane (CH4)?

• tetrahedral

• linear

• bent

• trigonal pyramidal

What is the molecular geometry of carbon dioxide (CO2)?

• trigonal planar

• tetrahedral

• linear

• bent