Question 1

How many lone electron pairs does the ClO (-1 charged) polyatomic anion have?

Accepted Answer

A)  one
B)  three
C)  six
D)  two
E)  none of the aboveF) A) and B)
G) B) and E)

Question 2

The Lewis theory predicts that the formula for a compound of magnesium and sulfur is MgS2.

Accepted Answer

A) True 
 B)False

Question 3

The Lewis theory predicts that the formula for a compound made of sodium and fluorine is NaF.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following compounds have resonance structures?

Accepted Answer

A)  CH4
B)  H2O
C)  NH3
D)  O3
E)  None of the compounds have resonance structures.F) A) and B)
G) C) and D)

Question 5

The correct Lewis structure for CO2 shows that the carbon atom has two sets of lone pair electrons.

Accepted Answer

A) True 
 B)False

Question 6

Having eight valence electrons is very stable and is called an octet.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following has a tetrahedral electron geometry and a trigonal pyramidal molecular geometry?

Accepted Answer

A)  Br2O
B)  GeH4
C)  SO2
D)  PF3
E)  none of the aboveF) C) and E)
G) D) and E)

Question 8

How does soap work?

Accepted Answer

A)  Soap works by breaking grease molecules into smaller molecules that dissolve in water.
B)  Soap works by making water into a nonpolar liquid which grease can dissolve in.
C)  Soap works by having a polar end and a nonpolar end which allows the water and oil to interact indirectly.
D)  Soap works by having a polar end which attaches to the grease molecule and polarizes it and turns the grease molecule into another soap molecule.This is a chain reaction.
E)  none of the aboveF) All of the above
G) A) and B)

Question 9

What is the molecular geometry of SiH4?

Accepted Answer

A)  bent
B)  linear
C)  tetrahedral
D)  trigonal pyramidal
E)  not enough informationF) C) and E)
G) All of the above

Question 10

Which of the following statements are TRUE about the BF3 molecule?

Accepted Answer

A)  BF3 has a trigonal planar molecular geometry.
B)  BF3 violates the octet rule for the central atom.
C)  BF3 is nonpolar.
D)  All of the above statements are true.
E)  None of the above are true.F) D) and E)
G) A) and C)

Question 11

Which molecule listed below is a polar molecule?

Accepted Answer

A)  NH3
B)  H2O
C)  HCN
D)  all of the compounds
E)  none of the compoundsF) All of the above
G) A) and E)

Question 12

What is the molecular geometry of NH4+?

Accepted Answer

A)  bent
B)  linear
C)  tetrahedral
D)  trigonal pyramidal
E)  not enough informationF) A) and D)
G) B) and C)

Question 13

When calculating the number of electrons for the Lewis structure of a polyatomic ion,you must add one electron for each negative charge and subtract one electron for each positive charge.

Accepted Answer

A) True 
 B)False

Question 14

What is the angle between electron groups in the linear electron geometry?

Accepted Answer

A)  90°
B)  109.5°
C)  120°
D)  180°
E)  not enough informationF) A) and D)
G) C) and D)

Question 15

What is the correct Lewis structure for Br2?

Accepted Answer

A)  Br-Br
B)  : 2? 
A)  Br-Br 
B)  :   -    : 
C)     =    
D)  : Br ≡ Br : 
E)  none of the above" class="answers-bank-image d-inline" rel="preload" >- 2? 
A)  Br-Br 
B)  :   -    : 
C)     =    
D)  : Br ≡ Br : 
E)  none of the above" class="answers-bank-image d-inline" rel="preload" >:
C)   2? 
A)  Br-Br 
B)  :   -    : 
C)     =    
D)  : Br ≡ Br : 
E)  none of the above" class="answers-bank-image d-inline" rel="preload" >= 2? 
A)  Br-Br 
B)  :   -    : 
C)     =    
D)  : Br ≡ Br : 
E)  none of the above" class="answers-bank-image d-inline" rel="preload" >
D)  : Br ≡ Br :
E)  none of the aboveF) All of the above
G) A) and D)

Question 16

What is the electron geometry if you have 2 electron groups around the center atom?

Accepted Answer

A)  linear
B)  trigonal planar
C)  tetrahedral
D)  trigonal bipyramidal
E)  not enough informationF) A) and B)
G) A) and D)

Question 17

The total number of electrons to be counted for the Lewis structure of the PO43- polyatomic ion is:

Accepted Answer

A)  8.
B)  26.
C)  29.
D)  32.
E)  none of the aboveF) None of the above
G) B) and C)

Question 18

Which molecule below would have a Lewis structure that is an exception to the octet rule?

Accepted Answer

A)  BH3
B)  NO
C)  SI6
D)  PF5
E)  all of theseF) A) and E)
G) A) and B)

Question 19

Consider the Lewis structures for the compound SO3 and the polyatomic ions SO32- and SO42-.Which of these must exist as a set of resonance structures?

Accepted Answer

A)  SO3 only
B)  SO32- only
C)  SO42- only
D)  all of these show resonance
E)  none of these show resonanceF) B) and C)
G) A) and E)

Question 20

The electronegativity value for Mg is 1.2 and the value for O is 3.5.Based on these values,what type of bond is expected for a compound formed between Mg and O?

Accepted Answer

A)  ionic
B)  pure covalent
C)  polar covalent
D)  not enough information
E)  none of the aboveF) B) and C)
G) A) and C)

Exam 10: Chemical Bonding

The Lewis theory predicts that the formula for a compound made of sodium and fluorine is NaF.

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The correct Lewis structure for CO2 shows that the carbon atom has two sets of lone pair electrons.

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The electronegativity value for Mg is 1.2 and the value for O is 3.5.Based on these values,what type of bond is expected for a compound formed between Mg and O?

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How many lone electron pairs does the ClO (-1 charged) polyatomic anion have?

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Having eight valence electrons is very stable and is called an octet.

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What is the angle between electron groups in the linear electron geometry?

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How does soap work?

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Consider the Lewis structures for the compound SO3 and the polyatomic ions SO32- and SO42-.Which of these must exist as a set of resonance structures?

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Which of the following compounds have resonance structures?

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When calculating the number of electrons for the Lewis structure of a polyatomic ion,you must add one electron for each negative charge and subtract one electron for each positive charge.

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What is the molecular geometry of NH4+?

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What is the electron geometry if you have 2 electron groups around the center atom?

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Which molecule below would have a Lewis structure that is an exception to the octet rule?

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The total number of electrons to be counted for the Lewis structure of the PO43- polyatomic ion is:

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The Lewis theory predicts that the formula for a compound of magnesium and sulfur is MgS2.

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Which of the following has a tetrahedral electron geometry and a trigonal pyramidal molecular geometry?

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What is the correct Lewis structure for Br2?

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What is the molecular geometry of SiH4?

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Which molecule listed below is a polar molecule?

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Which of the following statements are TRUE about the BF3 molecule?

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The correct Lewis structure for CO₂ shows that the carbon atom has two sets of lone pair electrons.

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Consider the Lewis structures for the compound SO₃ and the polyatomic ions SO₃^2- and SO₄^2-.Which of these must exist as a set of resonance structures?

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What is the molecular geometry of NH₄⁺?

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The total number of electrons to be counted for the Lewis structure of the PO₄^3- polyatomic ion is:

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The Lewis theory predicts that the formula for a compound of magnesium and sulfur is MgS₂.

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What is the correct Lewis structure for Br₂?

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What is the molecular geometry of SiH₄?

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Which of the following statements are TRUE about the BF₃molecule?

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