VSEPR Review

What is the VSEPR theory used to predict?

• Bond Strength

• Polarity

• Molecular Shape

• Electronegativity

According to VSEPR, molecules adjust their shapes to keep which of the following as far away as possible?

• Pairs of valence electrons

• Inner shell electrons

• Mobile Electrons

• Electrons closest to the nucleus

What is the AXE # of this molecule ?

• AX₃E₃

• AX₃E

• AXE₃

• AX₃E₂

What is the AXE # of the molecule shown?

• AX₂E₃

• AXE₃

• AX₄E

• AX₃E₂

What is the shape of a molecule with three bonding pairs and no lone pairs of electrons?

• Linear

• Trigonal planar

• Tetrahedral

• Bent

How does the presence of lone pairs affect the bond angles in a molecule?

• Increases the bond angles

• Decreases the bond angles

• Does not affect the bond angles

• Randomly affects the bond angles

What is the bond angle in a trigonal planar molecule?

• 90°

• 109.5°

• 120°

• 180°

In VSEPR theory, what do lone pairs of electrons do to the shape of a molecule?

• They do not affect the shape.

• They make the molecule larger.

• They push bonding pairs closer together.

• They pull bonding pairs further apart.

Which molecular geometry is formed by two bonding pairs and two lone pairs of electrons?

• Linear

• Trigonal planar

• Tetrahedral

• Bent

Which of the following is NOT a factor that VSEPR theory considers to predict the shape of a molecule?

• The number of lone pairs on the central atom

• The number of bonding pairs on the central atom

• The weight of the atoms in the molecule

• The repulsion between electron pairs