Exam 9: Molecular Geometry: Shape Determines Function

A) sp²
B) sp³
C) sp³d
D) sp
E) sp³d²

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A) SiF₄
B) KrF₄
C) SF₄
D) C₂H₄
E) C₂H₂

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A) electron-proton attractive forces.
B) electron-electron attractive forces.
C) electron-electron repulsive forces.
D) proton-proton repulsive forces.
E) electron-nucleus attractive forces.

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A) ( $\sigma$ )
B) ( $\pi$ )
C) ( $\sigma$ *)
D) ( $\pi$ *)
E) s

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A) CF₄
B) NF₃
C) F₂O
D) NF₂^-
E) NH₃

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The structure with all formal charges eq...

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A) $\left( \sigma _ { 2 s } \right) ^ { 2 } \left( \sigma _ { 2 s } ^ { * } \right) ^ { 2 } \left( \pi _ { 2 p } \right) ^ { 4 } \left( \sigma _ { 2 p } \right) ^ { 2 } \left( \pi _ { 2 p } ^ { * } \right) ^ { 2 } \left( \sigma _ { 2 p } ^ { * } \right) ^ { 2 }$
B) $\left( \sigma _ { 2 s } \right) ^ { 2 } \left( \sigma _ { 2 s } ^ { * } \right) ^ { 2 } \left( \pi _ { 2 p } \right) ^ { 6 } \left( \sigma _ { 2 s } \right) ^ { 2 } \left( \pi _ { 2p } ^ { * } \right) ^ { 2 }$
C) $\left( \sigma _ { 2 s } \right) ^ { 2 } \left( \sigma _ { 2 s } ^ { * } \right) ^ { 2 } \left( \sigma _ { 2p } \right) ^ { 2 } \left( \pi _ { 2 p } \right) ^ { 4 } \left( \pi _ { 2 p } ^ { * } \right) ^ { 4 }$
D) $\left( \sigma _ { 2 s } \right) ^ { 2 } \left( \sigma _ { 2 s } ^ { * } \right) ^ { 2 } \left( \pi _ { 2 p } \right) ^ { 4 } \left( \sigma _ { 2 p } ^ { * } \right) ^ { 2 } \left( \pi _ { 2 p } ^ { * } \right) ^ { 4 }$
E) $\left( \sigma _ { 2 s } \right) ^ { 2 } \left( \sigma _ { 2 s } ^ { * } \right) ^ { 2 } \left( \pi _ { 2p } \right) ^ { 4 } \left( \sigma _ { 2 p } \right) ^ { 2 } \left( \sigma _ { 2 p } ^ { * } \right) ^ { 2 } \left( \pi _ { 2 p } ^ { * } \right) ^ { 2 }$

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A) Valence bond theory describes a bond as the overlap of atomic orbitals between two atoms.
B) Enhanced electron density between two positively charged nuclei attracts the nuclei together and forms the bond.
C) Hybridization of atomic orbitals is necessary to account for the molecular geometry.
D) In valence bond theory, hybridization determines the molecular shape or geometry.
E) Statements A-D are all correct.

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A) carbon-oxygen
B) carbon-sulfur
C) carbon-nitrogen
D) carbon-hydrogen
E) carbon-chlorine

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A) H₂O
B) H₂S
C) ICl₃
D) I₃^-
E) SO₂

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A) linear
B) bent
C) tetrahedral
D) trigonal pyramidal
E) trigonal planar

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A) C₂H₂
B) H₂CO
C) CH₃Cl
D) C₂H₄
E) C₂H₂Cl₂

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A) SO₂
B) N₂O
C) HCN
D) CO₂
E) BeH₂

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A) The molecular shape or geometry can differ from the electron-pair geometry.
B) In VSEPR theory, the shape or geometry of a molecule is determined by electron-electron repulsion.
C) The steric number of a central atom is the sum of the number of bonds and lone pairs around the atom.
D) The steric number has five values from 2 to 6.
E) Statements A-D are all correct.

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C1 and C2 are sp² hybridized. B...

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A) the same as the H-O-H angle in water.
B) exactly 109.5 $\degree$ .
C) greater than 109.5 $\degree$ .
D) less than 109.5°.
E) 120°.

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A) SO₂
B) OCS
C) ICl₃
D) I₃^-
E) C₂H₂

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A) linear
B) trigonal planar
C) tetrahedral
D) trigonal bipyramidal
E) octahedral

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