Question 1

Identify the compound with covalent bonding.

Accepted Answer

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

Question 2

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

Accepted Answer

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

Question 3

Identify the complete electronic configuration for S2-.

Accepted Answer

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

Question 4

Identify the compound with the lowest magnitude of lattice energy.

Accepted Answer

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

Question 5

Identify the compound with ionic bonding.

Accepted Answer

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

Question 6

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

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 7

Which molecule or compound below contains a pure covalent bond?

Accepted Answer

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

Question 8

Choose the best Lewis structure for NO3⁻.

Accepted Answer

A)   3⁻. 
A)     
B)     
C)     
D)     
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B)   3⁻. 
A)     
B)     
C)     
D)     
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C)   3⁻. 
A)     
B)     
C)     
D)     
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D)   3⁻. 
A)     
B)     
C)     
D)     
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E)   3⁻. 
A)     
B)     
C)     
D)     
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Question 9

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

Question 10

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

Question 11

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.

Question 12

Choose the best Lewis structure for SeO42⁻.

Accepted Answer

A)   42⁻. 
A)     
B)     
C)     
D)     
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B)   42⁻. 
A)     
B)     
C)     
D)     
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C)   42⁻. 
A)     
B)     
C)     
D)     
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D)   42⁻. 
A)     
B)     
C)     
D)     
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E)   42⁻. 
A)     
B)     
C)     
D)     
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Question 13

Give the number of valence electrons for SO42-.

Accepted Answer

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

Question 14

Choose the best Lewis structure for NH4⁺.

Accepted Answer

A)   4⁺. 
A)     
B)     
C)     
D)     
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B)   4⁺. 
A)     
B)     
C)     
D)     
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C)   4⁺. 
A)     
B)     
C)     
D)     
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D)   4⁺. 
A)     
B)     
C)     
D)     
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E)   4⁺. 
A)     
B)     
C)     
D)     
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Question 15

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.

Question 16

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

Question 17

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

Question 18

Draw the Lewis dot structure for Al3+.

Accepted Answer

The Al should have n...

Question 19

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

Question 20

Define bond energy.

Accepted Answer

Bond energy is the e...

Exam 9: Chemical Bonding I: Lewis Theory

Which of the following processes is exothermic?

Correct AnswerverifiedShow Answer

Give the number of valence electrons for SO42-.

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

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Identify the complete electronic configuration for S2-.

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Identify the compound with covalent bonding.

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Choose the best Lewis structure for NH4⁺.

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

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Identify the compound with the lowest magnitude of lattice energy.

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

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Draw the Lewis dot structure for Al3+.

Correct AnswerverifiedThe Al should have n...View AnswerShow Answer

Which molecule or compound below contains a pure covalent bond?

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Identify the compound with ionic bonding.

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

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

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Choose the best Lewis structure for SeO42⁻.

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Choose the best Lewis structure for NO3⁻.

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

Correct AnswerverifiedShow Answer

Which of the following elements can form hypercoordinate compounds?

Correct AnswerverifiedShow Answer

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

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Define bond energy.

Correct AnswerverifiedBond energy is the e...View AnswerShow Answer

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

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Identify the complete electronic configuration for S^2-.

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Choose the best Lewis structure for NH₄⁺.

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

Correct Answer
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Draw the Lewis dot structure for Al³⁺.

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The Al should have n...
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Draw the best Lewis structure for CH₃^-1. What is the formal charge on the C?

Correct Answer
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Choose the best Lewis structure for SeO₄²⁻.

Correct Answer
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Choose the best Lewis structure for NO₃⁻.

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

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

Correct Answer
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Correct Answer
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Bond energy is the e...
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