Question 1

Which of the following represent the Lewis structure for Cl?

Accepted Answer

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

Question 2

Identify the compound with covalent bonding.

Accepted Answer

A) NaCl 
B) KCl 
C) H2O 
D) CaO 
E) SrBr2 
A) NaCl 
B) KCl 
C) H2O 
D) CaO 
E) SrBr2

Question 3

Place the following in order of decreasing bond length. 
H-F $\quad$H-I $\quad$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 4

Use Lewis theory to determine the chemical formula for the compound formed between K and I.

Accepted Answer

A) KI2 
B) K2I 
C) KI 
D) K2I2 
A) KI2 
B) K2I 
C) KI 
D) K2I2

Question 5

Use Lewis theory to determine the chemical formula for the compound formed between Al and O.

Accepted Answer

A) Al3O2 
B) Al2O3 
C) AlO2 
D) Al2O 
E) AlO 
A) Al3O2 
B) Al2O3 
C) AlO2 
D) Al2O 
E) AlO

Question 6

How many lone pairs of electrons are on the As atom in AsCl3?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
A) 0 
B) 1 
C) 2 
D) 3

Question 7

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

Accepted Answer

A) Li Cl 
B) Na Cl 
C) K Cl 
D) Rb Cl 
A) Li Cl 
B) Na Cl 
C) K Cl 
D) Rb Cl

Question 8

Which of the following represent the Lewis structure for Mg?

Accepted Answer

A)    
B)  $\mathrm { Mg }$ 
C)  $\text { Mg: }$ 
D)    
E)    
A)    
B)  $\mathrm { Mg }$ 
C)  $\text { Mg: }$ 
D)    
E)

Question 9

In the best Lewis structure for CN-,what is the formal charge on the N atom?

Accepted Answer

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

Question 10

Choose the best Lewis structure for CH2Cl2.

Accepted Answer

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

Question 11

Identify the compound with ionic bonding.

Accepted Answer

A) NaCl 
B) CH4 
C) H2O 
D) H2 
E) CO2 
A) NaCl 
B) CH4 
C) H2O 
D) H2 
E) CO2

Question 12

How many of the following elements can form hypercoordinate compounds? 
Pb $\quad$Kr $\quad$Si $\quad$B

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 4 
A) 0 
B) 1 
C) 2 
D) 3 
E) 4

Question 13

The electronegativity is 2.1 for H and 1.9 for Pb.Based on these electronegativities,PbH4 would be expected to

Accepted Answer

A) be ionic and contain H- ions. 
B) be ionic and contain H+ ions. 
C) have polar covalent bonds with a partial negative charge on the H atoms. 
D) have polar covalent bonds with a partial positive charge on the H atoms. 
A) be ionic and contain H- ions. 
B) be ionic and contain H+ ions. 
C) have polar covalent bonds with a partial negative charge on the H atoms. 
D) have polar covalent bonds with a partial positive charge on the H atoms.

Question 14

Draw the best Lewis structure for CH3-.What is the formal charge on the C?

Accepted Answer

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

Question 15

Which of the following reactions is associated with the lattice energy of CaS ( )?

Accepted Answer

A) Ca(s)+ S(s)→ CaS(s) 
B) CaS(s)→ Ca(s)+ S(s) 
C) Ca2+ (aq)+ S2- (aq)→ CaS(s) 
D) Ca2+ (g)+ S2- (g)→ CaS(s) 
E) CaS(s)→ Ca2+ (aq)+ S2- (aq) 
A) Ca(s)+ S(s)→ CaS(s) 
B) CaS(s)→ Ca(s)+ S(s) 
C) Ca2+ (aq)+ S2- (aq)→ CaS(s) 
D) Ca2+ (g)+ S2- (g)→ CaS(s) 
E) CaS(s)→ Ca2+ (aq)+ S2- (aq)

Question 16

Which of the following processes is endothermic?

Accepted Answer

A) K+ (g)+ I- (g)→ KI(s) 
B) 2Br(g)→ Br2(g) 
C) Ca(s)→ Ca(g) 
D) 2Na(s)+ $\frac{1}{2}$ O2(g)→ Na2O(s) 
E) None of the above processes is endothermic. 
A) K+ (g)+ I- (g)→ KI(s) 
B) 2Br(g)→ Br2(g) 
C) Ca(s)→ Ca(g) 
D) 2Na(s)+ $\frac{1}{2}$ O2(g)→ Na2O(s) 
E) None of the above processes is endothermic.

Question 17

Choose the bond below that is the strongest.

Accepted Answer

A) C-F 
B) C=O 
C) C-I 
D) I-I 
E) C≡N 
A) C-F 
B) C=O 
C) C-I 
D) I-I 
E) C≡N

Question 18

Define dipole moment.

Accepted Answer

Dipole moment is the measured

Question 19

Place the following in order of increasing magnitude of lattice energy. 
MgO $\quad$LiI $\quad$CaS

Accepted Answer

A) CaS < MgO < LiI 
B) LiI < CaS < MgO 
C) MgO < CaS < LiI 
D) LiI < MgO < CaS 
E) MgO < LiI < CaS 
A) CaS < MgO < LiI 
B) LiI < CaS < MgO 
C) MgO < CaS < LiI 
D) LiI < MgO < CaS 
E) MgO < LiI < CaS

Question 20

Use the data given below to construct a Born-Haber cycle to determine the electron affinity of Br. 
$$\begin{array} { l c } 
&\mathrm {Delta H ^ { \circ } \left( \mathrm { kJ } \mathrm { mol } ^ { - 1 } \right) } \\mathrm { K } ( s ) \rightarrow \mathrm { K } ( g ) &89 \  \
\mathrm {~K} ( g ) \rightarrow \mathrm { K } ^ { + } ( g ) + \mathrm { e } ^ { - } & 419 \
\mathrm { Br } 2 ( g ) \rightarrow 2 \mathrm { Br } ( g ) & 193 \
\mathrm {~K} ( s ) + \frac { 1 } { 2 } \operatorname { Br } 2 ( g ) \rightarrow \mathrm { KBr } ( s ) & - 394 \
\mathrm { KBr } ( s ) \rightarrow \mathrm { K } ^ { + } ( g ) + \mathrm { Br } ^ { - } ( g ) & 674
\end{array}$$

Accepted Answer

A) -885 kJ mol-1 
B) -325 kJ mol-1 
C) +367 kJ mol-1 
D) -464 kJ mol-1 
E) +246 kJ mol-1 
A) -885 kJ mol-1 
B) -325 kJ mol-1 
C) +367 kJ mol-1 
D) -464 kJ mol-1 
E) +246 kJ mol-1

Exam 9: Chemical Bonding I: Lewis Theory

Which of the following represent the Lewis structure for Cl?

Identify the compound with covalent bonding.

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

Use Lewis theory to determine the chemical formula for the compound formed between K and I.

Use Lewis theory to determine the chemical formula for the compound formed between Al and O.

How many lone pairs of electrons are on the As atom in AsCl3?

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

Which of the following represent the Lewis structure for Mg?

In the best Lewis structure for CN-,what is the formal charge on the N atom?

Choose the best Lewis structure for CH2Cl2.

Identify the compound with ionic bonding.

How many of the following elements can form hypercoordinate compounds? Pb \quad Kr \quad Si \quad B

The electronegativity is 2.1 for H and 1.9 for Pb.Based on these electronegativities,PbH4 would be expected to

Draw the best Lewis structure for CH3-.What is the formal charge on the C?

Which of the following reactions is associated with the lattice energy of CaS ()?

Which of the following processes is endothermic?

Choose the bond below that is the strongest.

Define dipole moment.

Place the following in order of increasing magnitude of lattice energy. MgO \quad LiI \quad CaS

Use the data given below to construct a Born-Haber cycle to determine the electron affinity of Br. (s)\rightarrow(g) 89\ (g)\rightarrow(g)+ 419 2(g)\rightarrow2(g) 193 (s)+ Br 2(g)\rightarrow(s) -394 (s)\rightarrow(g)+(g) 674

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

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

How many lone pairs of electrons are on the As atom in AsCl₃?

In the best Lewis structure for CN^-,what is the formal charge on the N atom?

Choose the best Lewis structure for CH₂Cl₂.

How many of the following elements can form hypercoordinate compounds? Pb $\quad$ Kr $\quad$ Si $\quad$ B

The electronegativity is 2.1 for H and 1.9 for Pb.Based on these electronegativities,PbH₄ would be expected to

Draw the best Lewis structure for CH₃^-.What is the formal charge on the C?

Place the following in order of increasing magnitude of lattice energy. MgO $\quad$ LiI $\quad$ CaS