Question 1

Choose the compound below that should have the lowest melting point according to the ionic bonding model.

Accepted Answer

A) LiF 
B) NaCl 
C) CsI 
D) KBr 
E) RbI 
A) LiF 
B) NaCl 
C) CsI 
D) KBr 
E) RbI

Question 2

Place the following elements in order of decreasing electronegativity. 
S $\quad$Cl $\quad$Se

Accepted Answer

A) Se > S > Cl 
B) Cl > Se > S 
C) Se > Cl > S 
D) S > Cl > Se 
E) Cl > S > Se 
A) Se > S > Cl 
B) Cl > Se > S 
C) Se > Cl > S 
D) S > Cl > Se 
E) Cl > S > Se

Question 3

Choose the best Lewis structure for BeF2.

Accepted Answer

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

Question 4

Place the following in order of decreasing magnitude of lattice energy. 
NaF $\quad$RbBr $\quad$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 5

A single covalent bond contains ________ of electrons.

Accepted Answer

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

Question 6

How many of the following elements can form hypercoordinate compounds? I O Cl Xe

Accepted Answer

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

Question 7

Use the bond energies provided to estimate ΔrH° for the reaction below. CH3OH(l)+ 2O2(g)→ CO2(g)+ 2H2O(g)$\quad$ΔrH° = ?
Bond $\quad$$\quad$Bond Energy (kJ mol-1)
C-H $\quad$$\quad$$\quad$$\quad$ 414
C-O $\quad$$\quad$$\quad$$\quad$ 360
C=O $\quad$$\quad$$\quad$$\quad$799
O=O $\quad$$\quad$$\quad$$\quad$498
O-H $\quad$$\quad$$\quad$$\quad$ 464

Accepted Answer

A) +473 kJ mol-1 
B) -91 kJ mol-1 
C) -486 kJ mol-1 
D) -392 kJ mol-1 
E) +206 kJ mol-1 
A) +473 kJ mol-1 
B) -91 kJ mol-1 
C) -486 kJ mol-1 
D) -392 kJ mol-1 
E) +206 kJ mol-1

Question 8

Which compound has the longest carbon-carbon bond length?

Accepted Answer

A) CH3CH3 
B) CH2CH2 
C) HCCH 
D) All bond lengths are the same. 
A) CH3CH3 
B) CH2CH2 
C) HCCH 
D) All bond lengths are the same.

Question 9

Place the following in order of decreasing XO bond length,where "X" represents the central atom in each of the following compounds or ions: 
$\quad$SiO32- $\quad$CO2 $\quad$CO32-

Accepted Answer

A) CO2 > SiO32- > CO32- 
B) CO2 > CO32- > SiO32- 
C) CO32- > CO2 > SiO32- 
D) CO32- > SiO32- > CO2 
E) SiO32- > CO32- > CO2 
A) CO2 > SiO32- > CO32- 
B) CO2 > CO32- > SiO32- 
C) CO32- > CO2 > SiO32- 
D) CO32- > SiO32- > CO2 
E) SiO32- > CO32- > CO2

Question 10

Which of the following represent the Lewis structure for Br-?

Accepted Answer

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

Question 11

Explain why the lattice energy of MgS is approximately four times as large as that of NaCl.

Accepted Answer

The Mg²⁺ and Na⁺ ions are similar in size t

Question 12

Using periodic trends,place the following bonds in order of increasing ionic character. 
S-F $\quad$Se-F $\quad$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 13

Rank the following molecules in decreasing bond energy. 
Cl2 $\quad$Br2 $\quad$F2 $\quad$I2

Accepted Answer

A) I2 > Br2 > Cl2 > F2 
B) Cl2 > Br2 > F2 > I2 
C) I2 > Cl2 > Br2 > F2 
D) Cl2 > I2 > F2 > Br2 
A) I2 > Br2 > Cl2 > F2 
B) Cl2 > Br2 > F2 > I2 
C) I2 > Cl2 > Br2 > F2 
D) Cl2 > I2 > F2 > Br2

Question 14

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

Accepted Answer

A) CaN 
B) Ca3N2 
C) CaN2 
D) Ca2N 
E) Ca2N3 
A) CaN 
B) Ca3N2 
C) CaN2 
D) Ca2N 
E) Ca2N3

Question 15

Which of the following reactions is associated with the lattice energy of RbI 
($\Delta _ { \mathrm { r } } \mathrm { H } _ { \text {lat tice } } ^ { \circ }$ )?

Accepted Answer

A) Rb(s)+ $\frac { 1 } { 2 }$ I2(g)? RbI(s) 
B) RbI(s)? Rb+ (g)+ I- (g) 
C) RbI(s)? Rb(s)+ $\frac { 1 } { 2 }$ I2(g) 
D) RbI(s)? Rb+ (aq)+ I- (aq) 
E) Rb+ (g)+ I- (g)? RbI(s) 
A) Rb(s)+ $\frac { 1 } { 2 }$ I2(g)? RbI(s) 
B) RbI(s)? Rb+ (g)+ I- (g) 
C) RbI(s)? Rb(s)+ $\frac { 1 } { 2 }$ I2(g) 
D) RbI(s)? Rb+ (aq)+ I- (aq) 
E) Rb+ (g)+ I- (g)? RbI(s)

Question 16

Which of the following reactions is associated with the lattice energy of Li2O 
( )?

Accepted Answer

A) Li2O(s)? 2Li+ (g)+ O2- (g) 
B) 2Li+ (aq)+ O2- (aq)? Li2O(s) 
C) 2Li+ (g)+ O2- (g)? Li2O(s) 
D) Li2O(s)? 2Li+ (aq)+ O2- (aq) 
E) 2Li(s)+ $\frac { 1 } { 2 }$ O2(g)? Li2O(s) 
A) Li2O(s)? 2Li+ (g)+ O2- (g) 
B) 2Li+ (aq)+ O2- (aq)? Li2O(s) 
C) 2Li+ (g)+ O2- (g)? Li2O(s) 
D) Li2O(s)? 2Li+ (aq)+ O2- (aq) 
E) 2Li(s)+ $\frac { 1 } { 2 }$ O2(g)? Li2O(s)

Question 17

Which of the following compounds is hypercoordinate?

Accepted Answer

A) CsI 
B) SnO2 
C) ClF5 
D) ClF 
A) CsI 
B) SnO2 
C) ClF5 
D) ClF

Question 18

Identify the longest 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 19

Which element can act as the centre atom in a hypercoordinate compound?

Accepted Answer

A) N 
B) O 
C) Br 
D) He 
A) N 
B) O 
C) Br 
D) He

Question 20

How are electron affinity and electronegativity different?

Accepted Answer

Electron affinity is the process of a si

Exam 9: Chemical Bonding I: Lewis Theory

Choose the compound below that should have the lowest melting point according to the ionic bonding model.

Place the following elements in order of decreasing electronegativity. S \quad Cl \quad Se

Choose the best Lewis structure for BeF2.

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

A single covalent bond contains ________ of electrons.

How many of the following elements can form hypercoordinate compounds? I O Cl Xe

Which compound has the longest carbon-carbon bond length?

Place the following in order of decreasing XO bond length,where "X" represents the central atom in each of the following compounds or ions: \quad SiO32- \quad CO2 \quad CO32-

Which of the following represent the Lewis structure for Br-?

Explain why the lattice energy of MgS is approximately four times as large as that of NaCl.

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

Rank the following molecules in decreasing bond energy. Cl2 \quad Br2 \quad F2 \quad I2

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

Which of the following reactions is associated with the lattice energy of RbI ( ΔrHlat tice ∘\Delta _ { \mathrm { r } } \mathrm { H } _ { \text {lat tice } } ^ { \circ }Δr​Hlat tice ∘​ )?

Which of the following reactions is associated with the lattice energy of Li2O ()?

Which of the following compounds is hypercoordinate?

Identify the longest bond.

Which element can act as the centre atom in a hypercoordinate compound?

How are electron affinity and electronegativity different?

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 elements in order of decreasing electronegativity. S $\quad$ Cl $\quad$ Se

Choose the best Lewis structure for BeF₂.

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

Place the following in order of decreasing XO bond length,where "X" represents the central atom in each of the following compounds or ions: $\quad$ SiO₃²^- $\quad$ CO₂ $\quad$ CO₃²^-

Which of the following represent the Lewis structure for Br^-?

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

Rank the following molecules in decreasing bond energy. Cl₂ $\quad$ Br₂ $\quad$ F₂ $\quad$ I₂

Which of the following reactions is associated with the lattice energy of RbI ( $\Delta _ { \mathrm { r } } \mathrm { H } _ { \text {lat tice } } ^ { \circ }$ )?

Which of the following reactions is associated with the lattice energy of Li₂O ()?