Question 1

What geometric arrangement of charge clouds is expected for an atom that has five charge clouds?

Accepted Answer

A) tetrahedral 
B) square planar 
C) trigonal bipyramidal 
D) octahedral 
A) tetrahedral 
B) square planar 
C) trigonal bipyramidal 
D) octahedral

Question 2

Which is the best description of the bonding in NO3-?

Accepted Answer

A) 3 N-O σ bonds and no N-O π bonds 
B) 3 N-O σ bonds and 3 N-O π bonds 
C) no N-O σ bonds and delocalized N-O π molecular orbitals extending over all four atoms 
D) 3 N-O σ bonds and delocalized N-O π molecular orbitals extending over all four atoms 
A) 3 N-O σ bonds and no N-O π bonds 
B) 3 N-O σ bonds and 3 N-O π bonds 
C) no N-O σ bonds and delocalized N-O π molecular orbitals extending over all four atoms 
D) 3 N-O σ bonds and delocalized N-O π molecular orbitals extending over all four atoms

Question 3

What is geometry around the carbon atom labeled C2?

Accepted Answer

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

Question 4

Which type of bond produces a charge cloud with a nodal plane containing the bond axis?

Accepted Answer

A) σ 
B) π 
C) σ and π 
D) neither σ nor π 
A) σ 
B) π 
C) σ and π 
D) neither σ nor π

Question 5

The bonds in the polyatomic ion CO32- are classified as

Accepted Answer

A) ionic. 
B) metallic. 
C) nonpolar covalent. 
D) polar covalent. 
A) ionic. 
B) metallic. 
C) nonpolar covalent. 
D) polar covalent.

Question 6

Arrange in order from the smallest to the largest bond angle: CCl3+,NF3,NH4+,XeBr4.

Accepted Answer

A) CCl3+,NF3,NH4+,XeBr4 
B) NF3,NH4+,XeBr4,CCl3+ 
C) XeBr4,NH4+,NF3,CCl3+ 
D) XeBr4,NF3,NH4+,CCl3+ 
A) CCl3+,NF3,NH4+,XeBr4 
B) NF3,NH4+,XeBr4,CCl3+ 
C) XeBr4,NH4+,NF3,CCl3+ 
D) XeBr4,NF3,NH4+,CCl3+

Question 7

Which molecule has a central atom that uses the set of hybrid orbitals shown below to form bonds with the non-central atoms?

Accepted Answer

A) H2O 
B) CO2 
C) NO2- 
D) ICl2- 
A) H2O 
B) CO2 
C) NO2- 
D) ICl2-

Question 8

What is the geometry around the central atom in the following molecular model of PH3?

Accepted Answer

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

Question 9

Use the following MO diagram for Be2,Be2+,and Be2-.Based on this diagram,

Accepted Answer

A) Be2+ is more stable than Be2,and Be2 is more stable than Be2-. 
B) Be2- is more stable than Be2,and Be2 is more stable than Be2+. 
C) Be2+ and Be2- are both more stable than Be2. 
D) Be2 is more stable than either Be2+ or Be2-. 
A) Be2+ is more stable than Be2,and Be2 is more stable than Be2-. 
B) Be2- is more stable than Be2,and Be2 is more stable than Be2+. 
C) Be2+ and Be2- are both more stable than Be2. 
D) Be2 is more stable than either Be2+ or Be2-.

Question 10

If an electron is added to H2 it would go into a

Accepted Answer

A) σ molecular orbital and strengthen the H-H bond. 
B) σ molecular orbital and weaken the H-H bond. 
C) σ* molecular orbital and strengthen the H-H bond. 
D) σ* molecular orbital and weaken the H-H bond. 
A) σ molecular orbital and strengthen the H-H bond. 
B) σ molecular orbital and weaken the H-H bond. 
C) σ* molecular orbital and strengthen the H-H bond. 
D) σ* molecular orbital and weaken the H-H bond.

Question 11

The dipole moment of ClF is 0.88 D,and its bond length is 163 pm.What is the percent ionic character of the Cl-F bond?

Accepted Answer

A) 0.54% 
B) 7.8% 
C) 11% 
D) 25% 
A) 0.54% 
B) 7.8% 
C) 11% 
D) 25%

Question 12

Which drawing represents the molecular orbital containing the highest energy electrons in the F2 molecule in its ground state?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
A) 
  
B) 
  
C) 
  
D)

Question 13

Which of the following should be nonlinear?

Accepted Answer

A) only I 
B) only II 
C) only III 
D) II and III 
A) only I 
B) only II 
C) only III 
D) II and III

Question 14

What is the hybridization of the nitrogen atom?

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) sp4 
A) sp 
B) sp2 
C) sp3 
D) sp4

Question 15

Electrostatic potential maps use color to portray the calculated electron distribution in a molecule.Atoms that are electron poor and carry a δ+ charge are shown in blue.Atoms that are electron rich and carry a δ- charge are shown in red.Atoms with little or no charge are shown in green.The electrostatic potential map of H2O below should show

Accepted Answer

A) H blue and O red. 
B) H blue and O green. 
C) H green and O blue. 
D) H red and O blue. 
A) H blue and O red. 
B) H blue and O green. 
C) H green and O blue. 
D) H red and O blue.

Question 16

What orbital hybridization is expected for the central atom in a molecule with a trigonal planar geometry?

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) sp4 
A) sp 
B) sp2 
C) sp3 
D) sp4

Question 17

What is the geometry around the central atom in the following molecular model of H3O+?

Accepted Answer

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

Question 18

Of NH4+ and NH4- the one with the smaller bond angles is ________.

Accepted Answer

Question 19

Which orbital hybridization is associated with a tetrahedral cloud arrangement?

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) sp4 
A) sp 
B) sp2 
C) sp3 
D) sp4

Question 20

What are the bond angles in the following molecular model of SCl4?

Accepted Answer

A) some less than 90° and one less than 180° 
B) 90° and 180° 
C) some less than 90° one less than 120° but greater than 90°,and one less than 180° but greater than 120° 
D) 90°,120°,and 180° 
A) some less than 90° and one less than 180° 
B) 90° and 180° 
C) some less than 90° one less than 120° but greater than 90°,and one less than 180° but greater than 120° 
D) 90°,120°,and 180°

Exam 8: Covalent Compounds: Bonding Theories and Molecular Structure

What geometric arrangement of charge clouds is expected for an atom that has five charge clouds?

Which is the best description of the bonding in NO3-?

What is geometry around the carbon atom labeled C2?

Which type of bond produces a charge cloud with a nodal plane containing the bond axis?

The bonds in the polyatomic ion CO32- are classified as

Arrange in order from the smallest to the largest bond angle: CCl3+,NF3,NH4+,XeBr4.

Which molecule has a central atom that uses the set of hybrid orbitals shown below to form bonds with the non-central atoms?

What is the geometry around the central atom in the following molecular model of PH3?

Use the following MO diagram for Be2,Be2+,and Be2-.Based on this diagram,

If an electron is added to H2 it would go into a

The dipole moment of ClF is 0.88 D,and its bond length is 163 pm.What is the percent ionic character of the Cl-F bond?

Which drawing represents the molecular orbital containing the highest energy electrons in the F2 molecule in its ground state?

Which of the following should be nonlinear?

What is the hybridization of the nitrogen atom?

What orbital hybridization is expected for the central atom in a molecule with a trigonal planar geometry?

What is the geometry around the central atom in the following molecular model of H3O+?

Of NH4+ and NH4- the one with the smaller bond angles is ________.

Which orbital hybridization is associated with a tetrahedral cloud arrangement?

What are the bond angles in the following molecular model of SCl4?

Chemical Tools: Experimentation and Measurement

Atoms, molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids, solids, and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

The Main-Group Elements

Connections to Organic and Biological Chemistry

Filters

Which is the best description of the bonding in NO₃^-?

What is geometry around the carbon atom labeled C₂?

The bonds in the polyatomic ion CO₃^2- are classified as

Arrange in order from the smallest to the largest bond angle: CCl₃⁺,NF₃,NH₄⁺,XeBr₄.

What is the geometry around the central atom in the following molecular model of PH₃?

Use the following MO diagram for Be₂,Be₂⁺,and Be₂^-.Based on this diagram,

If an electron is added to H₂ it would go into a

Which drawing represents the molecular orbital containing the highest energy electrons in the F₂ molecule in its ground state?

What is the geometry around the central atom in the following molecular model of H₃O⁺?

Of NH₄⁺and NH₄^-the one with the smaller bond angles is ________.

What are the bond angles in the following molecular model of SCl₄?