Question 1

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

Accepted Answer

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

Question 2

Which of the following elements can form compounds with an expanded octet?

Accepted Answer

A)  Br 
B)  O 
C)  Na 
D)  H 
E)  All of the above elements can form compounds with an expanded octet. 
A)  Br 
B)  O 
C)  Na 
D)  H 
E)  All of the above elements can form compounds with an expanded octet.

Question 3

Choose the bond below that is the weakest.

Accepted Answer

A)  C≡N 
B)  N≡N 
C)  C-I 
D)  C=S 
E)  Na-Cl 
A)  C≡N 
B)  N≡N 
C)  C-I 
D)  C=S 
E)  Na-Cl

Question 4

Identify the compound with the largest dipole moment in the gas phase.

Accepted Answer

A)  Cl2 
B)  BrF 
C)  HCl 
D)  NaBr 
E)  CCl4 
A)  Cl2 
B)  BrF 
C)  HCl 
D)  NaBr 
E)  CCl4

Question 5

Define electronegativity.

Accepted Answer

A)  the ability of an atom to repel neutrons in a chemical bond 
B)  the ability of an atom to repel electrons in a chemical bond 
C)  the ability of an atom to attract protons to itself in a chemical bond 
D)  the ability of an atom to attract neutrons to itself in a chemical bond 
E)  the ability of an atom to attract electrons to itself in a chemical bond 
A)  the ability of an atom to repel neutrons in a chemical bond 
B)  the ability of an atom to repel electrons in a chemical bond 
C)  the ability of an atom to attract protons to itself in a chemical bond 
D)  the ability of an atom to attract neutrons to itself in a chemical bond 
E)  the ability of an atom to attract electrons to itself in a chemical bond

Question 6

Define formal charge.

Accepted Answer

Formal charge is the charge of

Question 7

Place the following in order of decreasing magnitude of lattice energy. K2O Rb2S Li2O

Accepted Answer

A)  Li2O > K2O > Rb2S 
B)  Li2O > Rb2S > K2O 
C)  Rb2S > K2O > Li2O 
D)  Rb2S > Li2O > K2O 
E)  K2O > Li2O > Rb2S 
A)  Li2O > K2O > Rb2S 
B)  Li2O > Rb2S > K2O 
C)  Rb2S > K2O > Li2O 
D)  Rb2S > Li2O > K2O 
E)  K2O > Li2O > Rb2S

Question 8

Identify the strongest bond.

Accepted Answer

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

Question 9

Place the following elements in order of decreasing electronegativity. C F Sn

Accepted Answer

A)  Sn > C > F 
B)  F > Sn > C 
C)  Sn > F > C 
D)  C > F > Sn 
E)  F > C > Sn 
A)  Sn > C > F 
B)  F > Sn > C 
C)  Sn > F > C 
D)  C > F > Sn 
E)  F > C > Sn

Question 10

List the least electronegative atom.

Accepted Answer

The answer of List the least electronegative atom....

Question 11

Choose the best Lewis structure for CH2Cl2.

Accepted Answer

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

Question 12

Place the following in order of increasing magnitude of lattice energy. CaO MgO SrS

Accepted Answer

A)  MgO < CaO < SrS 
B)  SrS < MgO < CaO 
C)  SrS < CaO < MgO 
D)  CaO < MgO < SrS 
E)  CaO < SrS < MgO 
A)  MgO < CaO < SrS 
B)  SrS < MgO < CaO 
C)  SrS < CaO < MgO 
D)  CaO < MgO < SrS 
E)  CaO < SrS < MgO

Question 13

Ozone absorbs

Accepted Answer

A)  infrared light entering Earth's atmosphere. 
B)  ultraviolet light exiting Earth's atmosphere. 
C)  ultraviolet light entering Earth's atmosphere. 
D)  visible light entering Earth's atmosphere. 
E)  infrared light exiting Earth's atmosphere. 
A)  infrared light entering Earth's atmosphere. 
B)  ultraviolet light exiting Earth's atmosphere. 
C)  ultraviolet light entering Earth's atmosphere. 
D)  visible light entering Earth's atmosphere. 
E)  infrared light exiting Earth's atmosphere.

Question 14

How many of the following elements can form compounds with an expanded octet? I H Br As

Accepted Answer

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

Question 15

How many lone pairs are on the Br atom in BrF2-?

Accepted Answer

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

Question 16

A triple covalent bond contains

Accepted Answer

A)  0 pairs of neutrons. 
B)  1 pair of neutrons. 
C)  3 pairs of protons. 
D)  3 pairs of electrons. 
E)  2 pairs of neutrons. 
A)  0 pairs of neutrons. 
B)  1 pair of neutrons. 
C)  3 pairs of protons. 
D)  3 pairs of electrons. 
E)  2 pairs of neutrons.

Question 17

Identify the compound with the smallest percent ionic character.

Accepted Answer

A)  HF 
B)  IBr 
C)  N2 
D)  LiF 
E)  CO 
A)  HF 
B)  IBr 
C)  N2 
D)  LiF 
E)  CO

Question 18

Choose the best Lewis structure for OCl2.

Accepted Answer

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

Question 19

Use the bond energies provided to estimate ΔH°rxn for the reaction below. 2 Br2(l)+ C2H2(g)→ C2H2Br4(l)ΔH°rxn = ?
Bond Bond Energy (kJ/mol)
Br-Br 193
C≡C 837
C-C 347
C-Br 276
C-H 414

Accepted Answer

A)  +407 kJ 
B)  -324 kJ 
C)  -228 kJ 
D)  +573 kJ 
E)  -648 kJ 
A)  +407 kJ 
B)  -324 kJ 
C)  -228 kJ 
D)  +573 kJ 
E)  -648 kJ

Question 20

Which of the following represents the Lewis structure for Mg?

Accepted Answer

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

Exam 9: Chemical Bonding I: Lewis Theory

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

Which of the following elements can form compounds with an expanded octet?

Choose the bond below that is the weakest.

Identify the compound with the largest dipole moment in the gas phase.

Define electronegativity.

Define formal charge.

Place the following in order of decreasing magnitude of lattice energy. K2O Rb2S Li2O

Identify the strongest bond.

Place the following elements in order of decreasing electronegativity. C F Sn

List the least electronegative atom.

Choose the best Lewis structure for CH2Cl2.

Place the following in order of increasing magnitude of lattice energy. CaO MgO SrS

Ozone absorbs

How many of the following elements can form compounds with an expanded octet? I H Br As

How many lone pairs are on the Br atom in BrF2-?

A triple covalent bond contains

Identify the compound with the smallest percent ionic character.

Choose the best Lewis structure for OCl2.

Use the bond energies provided to estimate ΔH°rxn for the reaction below. 2 Br2(l)+ C2H2(g)→ C2H2Br4(l)ΔH°rxn = ? Bond Bond Energy (kJ/mol) Br-Br 193 C≡C 837 C-C 347 C-Br 276 C-H 414

Which of the following represents the Lewis structure for Mg?

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

Place the following in order of decreasing magnitude of lattice energy. K₂O Rb₂S Li₂O

Choose the best Lewis structure for CH₂Cl₂.

How many lone pairs are on the Br atom in BrF₂^-?

Choose the best Lewis structure for OCl₂.

Use the bond energies provided to estimate ΔH°_rxn for the reaction below. 2 Br₂(l)+ C₂H₂(g)→ C₂H₂Br₄(l)ΔH°_rxn= ? Bond Bond Energy (kJ/mol) Br-Br 193 C≡C 837 C-C 347 C-Br 276 C-H 414