Question 1

Which molecule or compound below contains an ionic bond?

Accepted Answer

A)  CS2 
B)  C2Br4 
C)  SiF4 
D)  OCl2 
E)  NH4NO3 
A)  CS2 
B)  C2Br4 
C)  SiF4 
D)  OCl2 
E)  NH4NO3

Question 2

A reaction is exothermic when

Accepted Answer

A)  weak bonds break and strong bonds form. 
B)  strong bonds break and weak bonds form. 
C)  weak bonds break and weak bonds form. 
D)  strong bonds break and strong bonds form. 
A)  weak bonds break and strong bonds form. 
B)  strong bonds break and weak bonds form. 
C)  weak bonds break and weak bonds form. 
D)  strong bonds break and strong bonds form.

Question 3

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 4

The antimony atom in SbCl3 would be expected to have a

Accepted Answer

A)  partial positive (δ+) charge. 
B)  partial negative (δ-) charge. 
C)  3+ charge. 
D)  3- charge. 
A)  partial positive (δ+) charge. 
B)  partial negative (δ-) charge. 
C)  3+ charge. 
D)  3- charge.

Question 5

Draw the best Lewis structure for CCl3+1.What is the formal charge on the C?

Accepted Answer

A)  0 
B)  +1 
C)  -1 
D)  -2 
E)  -5 
A)  0 
B)  +1 
C)  -1 
D)  -2 
E)  -5

Question 6

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

Accepted Answer

A)  SrI2 
B)  MgF2 
C)  BaCl2 
D)  SrF2 
E)  SrBr2 
A)  SrI2 
B)  MgF2 
C)  BaCl2 
D)  SrF2 
E)  SrBr2

Question 7

Match between columns
                        Premises: Sr-Sr
C=N
Cs-I
Ca-O
Se-I

Accepted Answer

The Answer of strongest covalent bond and weakest ionic bond is...

Question 8

Identify the ionic compound that is used as an anti-infective agent.

Accepted Answer

A)  potassium permanganate 
B)  barium sulfate 
C)  magnesium sulfate 
D)  sodium fluoride 
E)  sodium bicarbonate 
A)  potassium permanganate 
B)  barium sulfate 
C)  magnesium sulfate 
D)  sodium fluoride 
E)  sodium bicarbonate

Question 9

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 10

Choose the bond below that is the strongest.

Accepted Answer

A)  C-Cl 
B)  C=O 
C)  C-Br 
D)  I-I 
E)  C≡C 
A)  C-Cl 
B)  C=O 
C)  C-Br 
D)  I-I 
E)  C≡C

Question 11

Which of the following processes is endothermic?

Accepted Answer

A)  Na⁺(g) + Cl⁻(g) → NaCl(s) 
B)  2 F(g) → F2(g) 
C)  Ca(s) → Ca(g) 
D)  2 K(s) +   O2(g) → K2O(s) 
E)  None of the above is endothermic. 
A)  Na⁺(g) + Cl⁻(g) → NaCl(s) 
B)  2 F(g) → F2(g) 
C)  Ca(s) → Ca(g) 
D)  2 K(s) +   O2(g) → K2O(s) 
E)  None of the above is endothermic.

Question 12

Identify the number of bonding pairs and lone pairs of electrons in H2O.

Accepted Answer

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

Question 13

Identify the compound with the highest percent ionic character.

Accepted Answer

A)  HBr 
B)  IBr 
C)  H2 
D)  KF 
E)  CCl4 
A)  HBr 
B)  IBr 
C)  H2 
D)  KF 
E)  CCl4

Question 14

Using Lewis structures and formal charge,which of the following ions is most stable,? OCN⁻ ONC⁻ NOC⁻

Accepted Answer

A)  OCN⁻ 
B)  ONC⁻ 
C)  NOC⁻ 
D)  None of these ions are stable according to Lewis theory. 
E)  All of these compounds are equally stable according to Lewis theory. 
A)  OCN⁻ 
B)  ONC⁻ 
C)  NOC⁻ 
D)  None of these ions are stable according to Lewis theory. 
E)  All of these compounds are equally stable according to Lewis theory.

Question 15

List the most electronegative atom.

Accepted Answer

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

Question 16

Give the complete electronic configuration for S2-.

Accepted Answer

A)  1s22s22p63s24p6 
B)  1s22s22p63s23p6 
C)  1s22s22p63s23p5 
D)  1s22s23p64s25p6 
E)  1s22s2p63s2p6 
A)  1s22s22p63s24p6 
B)  1s22s22p63s23p6 
C)  1s22s22p63s23p5 
D)  1s22s23p64s25p6 
E)  1s22s2p63s2p6

Question 17

Which of the following represents the Lewis structure for S2⁻?

Accepted Answer

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

Question 18

Identify the compound with metallic bonding.

Accepted Answer

A)  LiI 
B)  Na 
C)  H2O 
D)  He 
E)  S 
A)  LiI 
B)  Na 
C)  H2O 
D)  He 
E)  S

Question 19

Give the number of pairs of valence electrons for BCl3.

Accepted Answer

A)  16 
B)  8 
C)  14 
D)  10 
E)  12 
A)  16 
B)  8 
C)  14 
D)  10 
E)  12

Question 20

Which of the following represents the Lewis structure for Cl?

Accepted Answer

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

Exam 9: Chemical Bonding I: Lewis Theory

Which molecule or compound below contains an ionic bond?

A reaction is exothermic when

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⁻

The antimony atom in SbCl3 would be expected to have a

Draw the best Lewis structure for CCl3+1.What is the formal charge on the C?

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

Identify the ionic compound that is used as an anti-infective agent.

Which compound has the longest carbon-carbon bond length?

Choose the bond below that is the strongest.

Which of the following processes is endothermic?

Identify the number of bonding pairs and lone pairs of electrons in H2O.

Identify the compound with the highest percent ionic character.

Using Lewis structures and formal charge,which of the following ions is most stable,? OCN⁻ ONC⁻ NOC⁻

List the most electronegative atom.

Give the complete electronic configuration for S2-.

Which of the following represents the Lewis structure for S2⁻?

Identify the compound with metallic bonding.

Give the number of pairs of valence electrons for BCl3.

Which of the following represents the Lewis structure for Cl?

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

The antimony atom in SbCl₃ would be expected to have a

Draw the best Lewis structure for CCl₃⁺¹.What is the formal charge on the C?

Identify the number of bonding pairs and lone pairs of electrons in H₂O.

Give the complete electronic configuration for S^2-.

Which of the following represents the Lewis structure for S²⁻?

Give the number of pairs of valence electrons for BCl₃.