Question 1

Match the following.
-Sr-Sr

Accepted Answer

A) strongest covalent bond 
B) longest covalent bond 
C) weakest ionic bond 
D) metallic bond 
E) highest melting point 
A) strongest covalent bond 
B) longest covalent bond 
C) weakest ionic bond 
D) metallic bond 
E) highest melting point

Question 2

Which of the following statements is TRUE?

Accepted Answer

A)  An ionic bond is much stronger than most covalent bonds. 
B)  An ionic bond is formed through the sharing of electrons. 
C)  Ionic compounds at room temperature typically conduct electricity. 
D)  Once dissolved in water, ionic compounds rarely conduct electricity. 
E)  None of the above is true. 
A)  An ionic bond is much stronger than most covalent bonds. 
B)  An ionic bond is formed through the sharing of electrons. 
C)  Ionic compounds at room temperature typically conduct electricity. 
D)  Once dissolved in water, ionic compounds rarely conduct electricity. 
E)  None of the above is true.

Question 3

Draw the resonance structure that has the lowest formal charge on each atom for SO3-2. What is the formal charge on sulfur?

Accepted Answer

A)  -1 
B)  +1 
C)  0 
D)  +2 
E)  +3 
A)  -1 
B)  +1 
C)  0 
D)  +2 
E)  +3

Question 4

Use the bond energies provided to estimate ΔrH° for the reaction below. PCl3(g) + Cl2(g) → PCl5(l) ΔrH° = ?
Bond Bond Energy (kJ mol-1)
Cl-Cl 243
P-Cl 331

Accepted Answer

A)  -243 kJ mol-1 
B)  -419 kJ mol-1 
C)  -662 kJ mol-1 
D)  -67 kJ mol-1 
E)  -905 kJ mol-1 
A)  -243 kJ mol-1 
B)  -419 kJ mol-1 
C)  -662 kJ mol-1 
D)  -67 kJ mol-1 
E)  -905 kJ mol-1

Question 5

Identify the compound with covalent bonding.

Accepted Answer

A)  Li2S 
B)  SrO 
C)  CaI2 
D)  C2Cl4 
E)  SrBr2 
A)  Li2S 
B)  SrO 
C)  CaI2 
D)  C2Cl4 
E)  SrBr2

Question 6

Choose the bond below that is the weakest.

Accepted Answer

A)  Na-Cl 
B)  I-I 
C)  C=N 
D)  Li-F 
E)  C=O 
A)  Na-Cl 
B)  I-I 
C)  C=N 
D)  Li-F 
E)  C=O

Question 7

Identify the substance that conducts electricity.

Accepted Answer

A)  NaCl dissolved in water 
B)  solid NaCl 
C)  water 
D)  solid sugar 
E)  sugar dissolved in water 
A)  NaCl dissolved in water 
B)  solid NaCl 
C)  water 
D)  solid sugar 
E)  sugar dissolved in water

Question 8

Using periodic trends, place the following bonds in order of increasing ionic character. S-F Se-F O-F

Accepted Answer

A)  Se-F < S-F < O-F 
B)  S-F < Se-F < O-F 
C)  O-F < Se-F < S-F 
D)  Se-F < O-F < S-F 
E)  O-F < S-F < Se-F 
A)  Se-F < S-F < O-F 
B)  S-F < Se-F < O-F 
C)  O-F < Se-F < S-F 
D)  Se-F < O-F < S-F 
E)  O-F < S-F < Se-F

Question 9

The Lewis structure of BrO3- is as follows:   What is the formal charge on Br atom?

Accepted Answer

Question 10

The Lewis structure of acetate ion is as follows: 
  
What is the formal charge on oxygen atom that contains three lone pairs of electrons?

Accepted Answer

The answer of The Lewis structure of acetate ion is...

Question 11

Choose the best Lewis structure for SF4.

Accepted Answer

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

Question 12

Which of the following represent the Lewis structure for Cl?

Accepted Answer

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

Question 13

Identify the compound with the highest magnitude of lattice energy.

Accepted Answer

A)  MgO 
B)  BaO 
C)  SrO 
D)  CaO 
A)  MgO 
B)  BaO 
C)  SrO 
D)  CaO

Question 14

Choose the best Lewis structure for PO43⁻.

Accepted Answer

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

Question 15

Choose the best Lewis structure for SeO42⁻.

Accepted Answer

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

Question 16

Which molecule or compound below contains a polar covalent bond?

Accepted Answer

A)  C2H4 
B)  ZnS 
C)  LiI 
D)  NCl3 
E)  AgCl 
A)  C2H4 
B)  ZnS 
C)  LiI 
D)  NCl3 
E)  AgCl

Question 17

Match the following.
-Ca-O

Accepted Answer

A) strongest covalent bond 
B) longest covalent bond 
C) weakest ionic bond 
D) metallic bond 
E) highest melting point 
A) strongest covalent bond 
B) longest covalent bond 
C) weakest ionic bond 
D) metallic bond 
E) highest melting point

Question 18

Choose the bond below that is most polar.

Accepted Answer

A)  H-I 
B)  H-Br 
C)  H-F 
D)  H-Cl 
E)  C-H 
A)  H-I 
B)  H-Br 
C)  H-F 
D)  H-Cl 
E)  C-H

Question 19

Choose the best Lewis structure for NH4⁺.

Accepted Answer

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

Question 20

Choose the best Lewis structure for OCl2.

Accepted Answer

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

Exam 9: Chemical Bonding I: Lewis Theory

Match the following. -Sr-Sr

Which of the following statements is TRUE?

Draw the resonance structure that has the lowest formal charge on each atom for SO3-2. What is the formal charge on sulfur?

Use the bond energies provided to estimate ΔrH° for the reaction below. PCl3(g) + Cl2(g) → PCl5(l) ΔrH° = ? Bond Bond Energy (kJ mol-1) Cl-Cl 243 P-Cl 331

Identify the compound with covalent bonding.

Choose the bond below that is the weakest.

Identify the substance that conducts electricity.

Using periodic trends, place the following bonds in order of increasing ionic character. S-F Se-F O-F

The Lewis structure of BrO3- is as follows: What is the formal charge on Br atom?

The Lewis structure of acetate ion is as follows: What is the formal charge on oxygen atom that contains three lone pairs of electrons?

Choose the best Lewis structure for SF4.

Which of the following represent the Lewis structure for Cl?

Identify the compound with the highest magnitude of lattice energy.

Choose the best Lewis structure for PO43⁻.

Choose the best Lewis structure for SeO42⁻.

Which molecule or compound below contains a polar covalent bond?

Match the following. -Ca-O

Choose the bond below that is most polar.

Choose the best Lewis structure for NH4⁺.

Choose the best Lewis structure for OCl2.

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry Ii: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

Draw the resonance structure that has the lowest formal charge on each atom for SO₃^-2. What is the formal charge on sulfur?

Use the bond energies provided to estimate Δ_rH° for the reaction below. PCl₃(g) + Cl₂(g) → PCl₅(l) Δ_rH°= ? Bond Bond Energy (kJ mol^-1) Cl-Cl 243 P-Cl 331

The Lewis structure of BrO₃^- is as follows: What is the formal charge on Br atom?

Choose the best Lewis structure for SF₄.

Choose the best Lewis structure for PO₄³⁻.

Choose the best Lewis structure for SeO₄²⁻.

Choose the best Lewis structure for NH₄⁺.

Choose the best Lewis structure for OCl₂.