Question 1

Which of the following processes is endothermic?

Accepted Answer

A) K⁺(g)+ I⁻(g)→ KI(s) 
B) 2 Br(g)→ Br2(g) 
C) Ca(s)→ Ca(g) 
D) 2 Na(s)+  O2(g)→ Na2O(s) 
E) None of the above are endothermic. 
A) K⁺(g)+ I⁻(g)→ KI(s) 
B) 2 Br(g)→ Br2(g) 
C) Ca(s)→ Ca(g) 
D) 2 Na(s)+  O2(g)→ Na2O(s) 
E) None of the above are endothermic.

Question 2

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 3

Choose the bond below that is the strongest.

Accepted Answer

A) N=O 
B) N-I 
C) N-O 
D) N-S 
E) N=N 
A) N=O 
B) N-I 
C) N-O 
D) N-S 
E) N=N

Question 4

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

Accepted Answer

A) Rb(s)+  I2(g)→ RbI(s) 
B) RbI(s)→ Rb+(g)+ I⁻(g) 
C) RbI(s)→ Rb(s)+  I2(g) 
D) RbI(s)→ Rb+(aq)+ I⁻(aq) 
E) Rb⁺(g)+ I⁻(g)→ RbI(s) 
A) Rb(s)+  I2(g)→ RbI(s) 
B) RbI(s)→ Rb+(g)+ I⁻(g) 
C) RbI(s)→ Rb(s)+  I2(g) 
D) RbI(s)→ Rb+(aq)+ I⁻(aq) 
E) Rb⁺(g)+ I⁻(g)→ RbI(s)

Question 5

Place the following in order of increasing bond length.
C-F C-Br C-Cl

Accepted Answer

A) C-Br < C-Cl < C-F 
B) C-Cl < C-F < C-Br 
C) C-F < C-Br < C-Cl 
D) C-F < C-Cl < C-Br 
E) C-Br < C-F < C-Cl 
A) C-Br < C-Cl < C-F 
B) C-Cl < C-F < C-Br 
C) C-F < C-Br < C-Cl 
D) C-F < C-Cl < C-Br 
E) C-Br < C-F < C-Cl

Question 6

Draw the best Lewis structure for the free radical,NO2.What is the formal charge on the N?

Accepted Answer

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

Question 7

Based on this data,predict which molecule is most polar?

Accepted Answer

A) ClF 
B) HF 
C) LiF 
D) Cl2 
A) ClF 
B) HF 
C) LiF 
D) Cl2

Question 8

Which of the following processes are exothermic?

Accepted Answer

A) Cl2(g)→ 2Cl(g) 
B) Br(g)+ e⁻ → Br⁻(g) 
C) Li(s)→ Li(g) 
D) NaF(s)→ Na⁺(g)+ F⁻(g) 
E) None of the above are exothermic. 
A) Cl2(g)→ 2Cl(g) 
B) Br(g)+ e⁻ → Br⁻(g) 
C) Li(s)→ Li(g) 
D) NaF(s)→ Na⁺(g)+ F⁻(g) 
E) None of the above are exothermic.

Question 9

How many lone pairs of electrons are on the S atom in SF4?

Accepted Answer

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

Question 10

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 11

Choose the bond below that is most polar.

Accepted Answer

A) C-N 
B) C-F 
C) C-O 
D) C-C 
E) F-F 
A) C-N 
B) C-F 
C) C-O 
D) C-C 
E) F-F

Question 12

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

Question 13

Which of the following statements is true?

Accepted Answer

A) A covalent bond is formed through the transfer of electrons from one atom to another. 
B) A pair of electrons involved in a covalent bond are sometimes referred to as "lone pairs." 
C) It is not possible for two atoms to share more than two electrons. 
D) Single bonds are shorter than double bonds. 
E) A covalent bond has a lower potential energy than the two separate atoms. 
A) A covalent bond is formed through the transfer of electrons from one atom to another. 
B) A pair of electrons involved in a covalent bond are sometimes referred to as "lone pairs." 
C) It is not possible for two atoms to share more than two electrons. 
D) Single bonds are shorter than double bonds. 
E) A covalent bond has a lower potential energy than the two separate atoms.

Question 14

Place the following in order of decreasing magnitude of lattice energy.
KF MgS RbI

Accepted Answer

A) RbI > KF > MgS 
B) RbI > MgS > KF 
C) MgS > RbI > KF 
D) KF > RbI > MgS 
E) MgS > KF > RbI 
A) RbI > KF > MgS 
B) RbI > MgS > KF 
C) MgS > RbI > KF 
D) KF > RbI > MgS 
E) MgS > KF > RbI

Question 15

Which molecule or compound below contains a pure covalent bond?

Accepted Answer

A) Li2CO3 
B) SCl6 
C) Cl2 
D) PF3 
E) NaCl 
A) Li2CO3 
B) SCl6 
C) Cl2 
D) PF3 
E) NaCl

Question 16

Match the following.
-Sr-Sr

Accepted Answer

A) weakest ionic bond 
B) strongest covalent bond 
C) metallic bond 
D) highest melting point 
E) longest covalent bond
F)Na-Br
G)C-F 
A) weakest ionic bond 
B) strongest covalent bond 
C) metallic bond 
D) highest melting point 
E) longest covalent bond
F)Na-Br
G)C-F

Question 17

Choose the best Lewis structure for PO43⁻.

Accepted Answer

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

Question 18

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

Accepted Answer

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

Question 19

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

Accepted Answer

A) SrI2 
B) MgF2 
C) CaCl2 
D) SrF2 
E) SrBr2 
A) SrI2 
B) MgF2 
C) CaCl2 
D) SrF2 
E) SrBr2

Question 20

In the best Lewis structure for BCl3 ,what is the formal charge on the B atom?

Accepted Answer

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

Which of the following processes is endothermic?

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

Choose the bond below that is the strongest.

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

Place the following in order of increasing bond length. C-F C-Br C-Cl

Draw the best Lewis structure for the free radical,NO₂.What is the formal charge on the N?

Based on this data,predict which molecule is most polar?

Which of the following processes are exothermic?

How many lone pairs of electrons are on the S atom in SF₄?

Choose the bond below that is the strongest.

Choose the bond below that is most polar.

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

Which of the following statements is true?

Place the following in order of decreasing magnitude of lattice energy. KF MgS RbI

Which molecule or compound below contains a pure covalent bond?

Match the following. -Sr-Sr

Choose the best Lewis structure for PO₄³⁻.

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

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

In the best Lewis structure for BCl₃,what is the formal charge on the B atom?

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, and

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Filters

Exam 9: Chemical Bonding I: Lewis Theory

Which of the following processes is endothermic?

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

Choose the bond below that is the strongest.

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

Place the following in order of increasing bond length. C-F C-Br C-Cl

Draw the best Lewis structure for the free radical,NO2.What is the formal charge on the N?

Based on this data,predict which molecule is most polar?

Which of the following processes are exothermic?

How many lone pairs of electrons are on the S atom in SF4?

Choose the bond below that is the strongest.

Choose the bond below that is most polar.

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

Which of the following statements is true?

Place the following in order of decreasing magnitude of lattice energy. KF MgS RbI

Which molecule or compound below contains a pure covalent bond?

Match the following. -Sr-Sr

Choose the best Lewis structure for PO43⁻.

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

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

In the best Lewis structure for BCl3 ,what is the formal charge on the B atom?

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, and

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Filters

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

Draw the best Lewis structure for the free radical,NO₂.What is the formal charge on the N?

How many lone pairs of electrons are on the S atom in SF₄?

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

Choose the best Lewis structure for PO₄³⁻.

In the best Lewis structure for BCl₃,what is the formal charge on the B atom?