Question 1

Which of the following reactions is associated with the lattice energy of Rb2S (ΔH°latt)?

Accepted Answer

A)  Rb2S(s) → 2 Rb⁺(g) + S2⁻(g) 
B)  2 Rb⁺(aq) + S2⁻(aq) → Rb2S(s) 
C)  2 Rb⁺(g) + S2⁻(g) → Rb2S(s) 
D)  Rb2S(s) → 2 Rb⁺(aq) + S2⁻(aq) 
E)  2 Rb(s) +   S2(g) → Rb2S(s) 
A)  Rb2S(s) → 2 Rb⁺(g) + S2⁻(g) 
B)  2 Rb⁺(aq) + S2⁻(aq) → Rb2S(s) 
C)  2 Rb⁺(g) + S2⁻(g) → Rb2S(s) 
D)  Rb2S(s) → 2 Rb⁺(aq) + S2⁻(aq) 
E)  2 Rb(s) +   S2(g) → Rb2S(s)

Question 2

Using periodic trends,place the following bonds in order of increasing ionic character. Si-P Si-Cl Si-S

Accepted Answer

A)  Si-P < Si-Cl < Si-S 
B)  Si-P < Si-S < Si-Cl 
C)  Si-S < Si-Cl < Si-P 
D)  Si-Cl < Si-P < Si-S 
E)  Si-Cl < Si-S < Si-P 
A)  Si-P < Si-Cl < Si-S 
B)  Si-P < Si-S < Si-Cl 
C)  Si-S < Si-Cl < Si-P 
D)  Si-Cl < Si-P < Si-S 
E)  Si-Cl < Si-S < Si-P

Question 3

Choose the best Lewis structure for ICl5.

Accepted Answer

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

Question 4

Choose the best Lewis structure for BF3.

Accepted Answer

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

Question 5

Give the number of valence electrons for XeI2.

Accepted Answer

A)  22 
B)  20 
C)  18 
D)  24 
E)  16 
A)  22 
B)  20 
C)  18 
D)  24 
E)  16

Question 6

Which of the following contains an atom that does NOT obey the octet rule?

Accepted Answer

A)  LiF 
B)  SnO2 
C)  BrF3 
D)  IF 
E)  O2 
A)  LiF 
B)  SnO2 
C)  BrF3 
D)  IF 
E)  O2

Question 7

Place the following in order of decreasing bond length. H-F H-I H-Br

Accepted Answer

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

Question 8

Choose the best Lewis structure for XeI2.

Accepted Answer

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

Question 9

The fluorine atom in F2 would be expected to have a

Accepted Answer

A)  charge of 1-. 
B)  partial charge δ-. 
C)  partial charge δ+. 
D)  charge of 0. 
A)  charge of 1-. 
B)  partial charge δ-. 
C)  partial charge δ+. 
D)  charge of 0.

Question 10

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 11

Give the number of valence electrons for ICl5.

Accepted Answer

A)  36 
B)  40 
C)  42 
D)  44 
E)  46 
A)  36 
B)  40 
C)  42 
D)  44 
E)  46

Question 12

Place the following in order of decreasing magnitude of lattice energy. NaF RbBr KCl

Accepted Answer

A)  RbBr > NaF > KCl 
B)  NaF > KCl > RbBr 
C)  KCl > NaF > RbBr 
D)  NaF > RbBr > KCl 
E)  RbBr > KCl > NaF 
A)  RbBr > NaF > KCl 
B)  NaF > KCl > RbBr 
C)  KCl > NaF > RbBr 
D)  NaF > RbBr > KCl 
E)  RbBr > KCl > NaF

Question 13

Place the following in order of increasing bond length. NO2⁻ NO3⁻ NO

Accepted Answer

A)  NO 2⁻ 3⁻ 
B)  NO2⁻ 3⁻ 3⁻ 2⁻ 
D)  NO 3⁻ 2⁻ 
E)  NO3⁻ 2⁻ < NO 
A)  NO 2⁻ 3⁻ 
B)  NO2⁻ 3⁻ 3⁻ 2⁻ 
D)  NO 3⁻ 2⁻ 
E)  NO3⁻ 2⁻ < NO

Question 14

Which of the following ionic compounds would be expected to have the highest lattice energy?

Accepted Answer

A)  RbF 
B)  RbCl 
C)  RbBr 
D)  RbI 
A)  RbF 
B)  RbCl 
C)  RbBr 
D)  RbI

Question 15

Give the number of valence electrons for SO42-.

Accepted Answer

A)  32 
B)  30 
C)  34 
D)  28 
E)  36 
A)  32 
B)  30 
C)  34 
D)  28 
E)  36

Question 16

Identify the shortest bond.

Accepted Answer

A)  single covalent bond 
B)  double covalent bond 
C)  triple covalent bond 
D)  All of the above bonds are the same length. 
A)  single covalent bond 
B)  double covalent bond 
C)  triple covalent bond 
D)  All of the above bonds are the same length.

Question 17

Use Lewis theory to determine the chemical formula for the compound formed between Sr and N.

Accepted Answer

A)  SrN 
B)  Sr3N2 
C)  SrN2 
D)  Sr2N 
E)  Sr2N3 
A)  SrN 
B)  Sr3N2 
C)  SrN2 
D)  Sr2N 
E)  Sr2N3

Question 18

Which molecule or compound below contains a polar covalent bond?

Accepted Answer

A)  C2H4 
B)  ZnS 
C)  KI 
D)  NCl3 
E)  AgF 
A)  C2H4 
B)  ZnS 
C)  KI 
D)  NCl3 
E)  AgF

Question 19

How are electron affinity and electronegativity different?

Accepted Answer

Electron affinity is the process of a si

Question 20

Identify the compound with polar covalent bonding.

Accepted Answer

A)  KF 
B)  K 
C)  H2 
D)  Ar 
E)  NH3 
A)  KF 
B)  K 
C)  H2 
D)  Ar 
E)  NH3

Exam 9: Chemical Bonding I: Lewis Theory

Which of the following reactions is associated with the lattice energy of Rb2S (ΔH°latt)?

Using periodic trends,place the following bonds in order of increasing ionic character. Si-P Si-Cl Si-S

Choose the best Lewis structure for ICl5.

Choose the best Lewis structure for BF3.

Give the number of valence electrons for XeI2.

Which of the following contains an atom that does NOT obey the octet rule?

Place the following in order of decreasing bond length. H-F H-I H-Br

Choose the best Lewis structure for XeI2.

The fluorine atom in F2 would be expected to have a

Which of the following statements is TRUE?

Give the number of valence electrons for ICl5.

Place the following in order of decreasing magnitude of lattice energy. NaF RbBr KCl

Place the following in order of increasing bond length. NO2⁻ NO3⁻ NO

Which of the following ionic compounds would be expected to have the highest lattice energy?

Give the number of valence electrons for SO42-.

Identify the shortest bond.

Use Lewis theory to determine the chemical formula for the compound formed between Sr and N.

Which molecule or compound below contains a polar covalent bond?

How are electron affinity and electronegativity different?

Identify the compound with polar covalent bonding.

Matter, measurement, and Problem Solving

Atoms and Elements

Molecules,compounds,and Chemical Equations

Chemical Quantities and Aqueous Reactions

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding Ii: Molecular Shapes,valence Bond Theory,

Liquids,solids,and Intermolecular Forces

Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

Which of the following reactions is associated with the lattice energy of Rb₂S (ΔH°_latt)?

Choose the best Lewis structure for ICl₅.

Choose the best Lewis structure for BF₃.

Give the number of valence electrons for XeI₂.

Choose the best Lewis structure for XeI₂.

The fluorine atom in F₂ would be expected to have a

Give the number of valence electrons for ICl₅.

Place the following in order of increasing bond length. NO₂⁻ NO₃⁻ NO

Give the number of valence electrons for SO₄^2-.