Question 1

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 2

Which of the following represent the Lewis structure for Ca2⁺?

Accepted Answer

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

Question 3

Identify the compound with the lowest magnitude of lattice energy.

Accepted Answer

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

Question 4

Draw the Lewis dot structure for Al3+.

Accepted Answer

The Al should have n

Question 5

Identify the compound with the lowest magnitude of lattice energy.

Accepted Answer

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

Question 6

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

Accepted Answer

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

Question 7

Which ionic compound would be expected to have the highest lattice energy?

Accepted Answer

A)  K2O 
B)  Ca O  
C)  Ga2O3 
D)  CsCl 
A)  K2O 
B)  Ca O  
C)  Ga2O3 
D)  CsCl

Question 8

The least electronegative atom is ________.

Accepted Answer

The answer of The least electronegative atom is ________....

Question 9

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

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) +   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) +   O2(g) → Li2O(s)

Question 10

Identify the complete electronic configuration for Br-.

Accepted Answer

A)  1s22s22p63s23p64s24p6 
B)  1s22s22p63s23p64s24d104p6 
C)  1s22s22p63s23p64s23d104p6 
D)  1s22s22p63s23p64s23d104p5 
E)  1s22s2p63s2p64s23d104p6 
A)  1s22s22p63s23p64s24p6 
B)  1s22s22p63s23p64s24d104p6 
C)  1s22s22p63s23p64s23d104p6 
D)  1s22s22p63s23p64s23d104p5 
E)  1s22s2p63s2p64s23d104p6

Question 11

Use Lewis theory to determine the chemical formula for the compound formed between Rb and S.

Accepted Answer

A)  RbS 
B)  RbS2 
C)  Rb2S 
D)  Rb2S3 
E)  Rb3S2 
A)  RbS 
B)  RbS2 
C)  Rb2S 
D)  Rb2S3 
E)  Rb3S2

Question 12

Choose the best Lewis structure for NO3⁻.

Accepted Answer

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

Question 13

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 14

Choose the bond below that is least polar.

Accepted Answer

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

Question 15

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 16

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

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 17

Which of the following resonance structures for OCN⁻ will contribute most to the correct structure of OCN⁻?

Accepted Answer

A)  O(2 lone pairs)=C=N(2 lone pairs) 
B)  O(1 lone pair)≡C-N(3 lone pairs) 
C)  O(1 lone pair)=C(2 lone pairs)=N(1 lone pair) 
D)  O(3 lone pairs)-C≡N(1 lone pair) 
E)  They all contribute equally to the correct structure of OCN⁻. 
A)  O(2 lone pairs)=C=N(2 lone pairs) 
B)  O(1 lone pair)≡C-N(3 lone pairs) 
C)  O(1 lone pair)=C(2 lone pairs)=N(1 lone pair) 
D)  O(3 lone pairs)-C≡N(1 lone pair) 
E)  They all contribute equally to the correct structure of OCN⁻.

Question 18

Place the following in order of decreasing XO bond length, where "X" represents the central atom in each of the following compounds or ions: SiO32⁻ CO2 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 19

Which compound has the highest carbon-carbon bond strength?

Accepted Answer

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

Question 20

Using periodic trends, place the following bonds in order of decreasing ionic character. Sb-Cl P-Cl As-Cl

Accepted Answer

A)  Sb-Cl > As-Cl > P-Cl 
B)  As-Cl > Sb-Cl > P-Cl 
C)  P-Cl > Sb-Cl > As-Cl 
D)  P-Cl > As-Cl > Sb-Cl 
E)  Sb-Cl > P-Cl > As-Cl 
A)  Sb-Cl > As-Cl > P-Cl 
B)  As-Cl > Sb-Cl > P-Cl 
C)  P-Cl > Sb-Cl > As-Cl 
D)  P-Cl > As-Cl > Sb-Cl 
E)  Sb-Cl > P-Cl > As-Cl

Exam 9: Chemical Bonding I: Lewis Theory

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

Which of the following represent the Lewis structure for Ca2⁺?

Identify the compound with the lowest magnitude of lattice energy.

Draw the Lewis dot structure for Al3+.

Identify the compound with the lowest magnitude of lattice energy.

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

Which ionic compound would be expected to have the highest lattice energy?

The least electronegative atom is ________.

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

Identify the complete electronic configuration for Br-.

Use Lewis theory to determine the chemical formula for the compound formed between Rb and S.

Choose the best Lewis structure for NO3⁻.

Identify the compound with ionic bonding.

Choose the bond below that is least polar.

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 (Δr)?

Which of the following resonance structures for OCN⁻ will contribute most to the correct structure of OCN⁻?

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

Which compound has the highest carbon-carbon bond strength?

Using periodic trends, place the following bonds in order of decreasing ionic character. Sb-Cl P-Cl As-Cl

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

Which of the following represent the Lewis structure for Ca²⁺?

Draw the Lewis dot structure for Al³⁺.

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

Identify the complete electronic configuration for Br^-.

Choose the best Lewis structure for NO₃⁻.

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 (Δ_r)?

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