Question 1

Draw the Lewis dot structure for Al3+.

Accepted Answer

The Al should have n

Question 2

List the following compounds in decreasing electronegativity difference. Cl2 HCl NaCl

Accepted Answer

A) NaCl > Cl2 > HCl 
B) Cl2 > HCl > NaCl 
C) HCl > NaCl > Cl2 
D) NaCl > HCl > Cl2 
A) NaCl > Cl2 > HCl 
B) Cl2 > HCl > NaCl 
C) HCl > NaCl > Cl2 
D) NaCl > HCl > Cl2

Question 3

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

Accepted Answer

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

Question 4

Choose the best Lewis structure for SeO42⁻.

Accepted Answer

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

Question 5

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 6

Which of the following elements can form hypercoordinate compounds?

Accepted Answer

A) Se 
B) C 
C) Li 
D) F 
E) All of the above elements can form hypercoordinate compounds. 
A) Se 
B) C 
C) Li 
D) F 
E) All of the above elements can form hypercoordinate compounds.

Question 7

Which of the following processes is exothermic?

Accepted Answer

A) the second ionization energy of Mg 
B) the sublimation of Li 
C) the breaking of the bond of I2 
D) the formation of NaBr from its constituent elements in their standard state 
E) None of the above processes is exothermic 
A) the second ionization energy of Mg 
B) the sublimation of Li 
C) the breaking of the bond of I2 
D) the formation of NaBr from its constituent elements in their standard state 
E) None of the above processes is exothermic

Question 8

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 9

Identify the compound with ionic bonding.

Accepted Answer

A) NaCl 
B) Li 
C) H2O 
D) He 
E) S 
A) NaCl 
B) Li 
C) H2O 
D) He 
E) S

Question 10

Choose the best Lewis structure for NO3⁻.

Accepted Answer

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

Question 11

Give the number of valence electrons for SO42-.

Accepted Answer

A) 32 
B) 30 
C) 34 
D) 28 
E) 36 
A) 32 
B) 30 
C) 34 
D) 28 
E) 36

Question 12

Choose the best Lewis structure for NH4⁺.

Accepted Answer

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

Question 13

Using periodic trends, place the following bonds in order of increasing ionic character. Si-P Si-Cl Si-S

Accepted Answer

A) Si-P < Si-Cl < Si-S 
B) Si-P < Si-S < Si-Cl 
C) Si-S < Si-Cl < Si-P 
D) Si-Cl < Si-P < Si-S 
E) Si-Cl < Si-S < Si-P 
A) Si-P < Si-Cl < Si-S 
B) Si-P < Si-S < Si-Cl 
C) Si-S < Si-Cl < Si-P 
D) Si-Cl < Si-P < Si-S 
E) Si-Cl < Si-S < Si-P

Question 14

The electronegativity is 2.1 for H and 1.9 for Pb. Based on these electronegativities, PbH4 would be expected to

Accepted Answer

A) be ionic and contain H- ions. 
B) be ionic and contain H+ ions. 
C) have polar covalent bonds with a partial negative charge on the H atoms. 
D) have polar covalent bonds with a partial positive charge on the H atoms. 
A) be ionic and contain H- ions. 
B) be ionic and contain H+ ions. 
C) have polar covalent bonds with a partial negative charge on the H atoms. 
D) have polar covalent bonds with a partial positive charge on the H atoms.

Question 15

Identify the compound with covalent bonding.

Accepted Answer

A) NaCl 
B) Li 
C) H2O 
D) He 
E) S 
A) NaCl 
B) Li 
C) H2O 
D) He 
E) S

Question 16

Identify 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

Define bond energy.

Accepted Answer

Bond energy is the e

Question 18

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 19

Draw the best Lewis structure for CH3-1. 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 20

Identify the compound with the lowest magnitude of lattice energy.

Accepted Answer

A) KCl 
B) KBr 
C) SrO 
D) CaO 
A) KCl 
B) KBr 
C) SrO 
D) CaO

Exam 9: Chemical Bonding I: Lewis Theory

Draw the Lewis dot structure for Al3+.

List the following compounds in decreasing electronegativity difference. Cl2 HCl NaCl

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

Choose the best Lewis structure for SeO42⁻.

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

Which of the following elements can form hypercoordinate compounds?

Which of the following processes is exothermic?

Which molecule or compound below contains a pure covalent bond?

Identify the compound with ionic bonding.

Choose the best Lewis structure for NO3⁻.

Give the number of valence electrons for SO42-.

Choose the best Lewis structure for NH4⁺.

Using periodic trends, place the following bonds in order of increasing ionic character. Si-P Si-Cl Si-S

The electronegativity is 2.1 for H and 1.9 for Pb. Based on these electronegativities, PbH4 would be expected to

Identify the compound with covalent bonding.

Identify the complete electronic configuration for S2-.

Define bond energy.

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

Draw the best Lewis structure for CH3-1. What is the formal charge on the C?

Identify the compound with the lowest magnitude of lattice energy.

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 Metallury

Transition Metals and Coordination Compounds

Filters

Draw the Lewis dot structure for Al³⁺.

List the following compounds in decreasing electronegativity difference. Cl₂ HCl NaCl

Choose the best Lewis structure for SeO₄²⁻.

Choose the best Lewis structure for NO₃⁻.

Give the number of valence electrons for SO₄^2-.

Choose the best Lewis structure for NH₄⁺.

The electronegativity is 2.1 for H and 1.9 for Pb. Based on these electronegativities, PbH₄ would be expected to

Identify the complete electronic configuration for S^2-.

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

Draw the best Lewis structure for CH₃^-1. What is the formal charge on the C?