Question 1

The formal charge on Cl in the structure shown for the perchlorate ion is _____.

Accepted Answer

A)  -2
B)  -1
C)  0
D)  +1
E)  +2F) A) and B)
G) All of the above

Question 2

Which of these compounds is most likely to be covalent?

Accepted Answer

A)  CsOH
B)  NF3
C)  Sr(NO3) 2
D)  CaO
E)  LiFF) A) and B)
G) B) and C)

Question 3

A single bond between two atoms represents ________ pair(s)of electrons.

Accepted Answer

The answer of A single bond between two atoms represents...

Question 4

Which of these choices is the best Lewis structure for ozone,O3?

Accepted Answer

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G) A) and B)

Question 5

Which of the following contains ionic bonding?

Accepted Answer

A)  CO
B)  SrF2
C)  Al
D)  OCl2
E)  HClF) B) and E)
G) None of the above

Question 6

Select the compound with the lowest (i.e.,least negative) lattice energy.

Accepted Answer

A)  CsBr(s) 
B)  NaCl(s) 
C)  SrO(s) 
D)  CaO(s) 
E)  KBr(s) F) C) and E)
G) B) and E)

Question 7

How many dots does the Lewis dot symbol for oxygen have around it?

Accepted Answer

A)  4
B)  2
C)  6
D)  3
E)  7F) A) and B)
G) None of the above

Question 8

Select the Lewis structure for XeO2F2 which correctly minimizes formal charges.

Accepted Answer

A)   2F2 which correctly minimizes formal charges. 
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G) B) and C)

Question 9

Only valence electrons are shown in the Lewis structure held together by covalent bonds.

Accepted Answer

A) True 
 B)False

Question 10

The total number of bonding electrons in a molecule of formaldehyde (H2CO) is

Accepted Answer

A)  3.
B)  4.
C)  6.
D)  8.
E)  18.F) A) and D)
G) C) and E)

Question 11

Which of these compounds is most likely to be ionic?

Accepted Answer

A)  GaAs
B)  SrBr2
C)  NO2
D)  CBr4
E)  H2OF) A) and E)
G) None of the above

Question 12

In the best Lewis structure for the fulminate ion,CNO-,what is the formal charge on the central nitrogen atom?

Accepted Answer

A)  +2
B)  +1
C)  0
D)  -1
E)  -2F) B) and E)
G) A) and B)

Question 13

What formal charge resides on the carbon of CO32-?

Accepted Answer

A)  0
B)  +1
C)  +2
D)  +3
E)  +4F) A) and B)
G) A) and C)

Question 14

Ionic compounds tend to form between metals and nonmetals when electrons are transferred from an element with high ionization energy (metal)to an element with a low electron affinity (nonmetal).

Accepted Answer

A) True 
 B)False

Question 15

The Lewis dot symbol for the a lead atom is

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and D)
G) A) and C)

Question 16

The number of resonance structures for the sulfur dioxide molecule that satisfy the octet rule is

Accepted Answer

A)  1.
B)  2.
C)  3.
D)  4.
E)  none of theseF) C) and E)
G) A) and B)

Question 17

What types of elements undergo covalent bonding?

Accepted Answer

A)  a metal and a noble gas
B)  a nonmetal and a metal
C)  two nonmetals
D)  two Group 1A elements
E)  an actinideF) D) and E)
G) A) and B)

Question 18

The Lewis dot symbol consists of the symbol for the element surrounded by dot(s) .What does the symbol represent?

Accepted Answer

A)  Electron configuration
B)  Valence electrons
C)  Atomic number
D)  Atomic mass
E)  Nucleus and core electronsF) D) and E)
G) C) and D)

Question 19

Which molecule has the largest dipole moment?

Accepted Answer

A)  HF
B)  HI
C)  HBr
D)  HCl
E)  All of the molecules have the same dipole moment.F) A) and E)
G) C) and D)

Question 20

Which of these compounds is most likely to be covalent?

Accepted Answer

A)  Rb2S
B)  SrCl2
C)  CS2
D)  CaO
E)  MgI2F) A) and D)
G) A) and E)

Exam 8: Chemical Bonding I Basic Concepts

Ionic compounds tend to form between metals and nonmetals when electrons are transferred from an element with high ionization energy (metal)to an element with a low electron affinity (nonmetal).

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Select the Lewis structure for XeO2F2 which correctly minimizes formal charges.

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The Lewis dot symbol for the a lead atom is

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The Lewis dot symbol consists of the symbol for the element surrounded by dot(s) .What does the symbol represent?

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Which molecule has the largest dipole moment?

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Which of the following contains ionic bonding?

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Which of these compounds is most likely to be ionic?

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Which of these compounds is most likely to be covalent?

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What types of elements undergo covalent bonding?

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What formal charge resides on the carbon of CO32-?

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In the best Lewis structure for the fulminate ion,CNO-,what is the formal charge on the central nitrogen atom?

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Only valence electrons are shown in the Lewis structure held together by covalent bonds.

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Which of these compounds is most likely to be covalent?

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Which of these choices is the best Lewis structure for ozone,O3?

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Select the compound with the lowest (i.e.,least negative) lattice energy.

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The total number of bonding electrons in a molecule of formaldehyde (H2CO) is

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How many dots does the Lewis dot symbol for oxygen have around it?

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The formal charge on Cl in the structure shown for the perchlorate ion is _____.

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The number of resonance structures for the sulfur dioxide molecule that satisfy the octet rule is

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A single bond between two atoms represents ________ pair(s)of electrons.

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Select the Lewis structure for XeO₂F₂ which correctly minimizes formal charges.

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What formal charge resides on the carbon of CO₃^2-?

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In the best Lewis structure for the fulminate ion,CNO^-,what is the formal charge on the central nitrogen atom?

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Which of these choices is the best Lewis structure for ozone,O₃?

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The total number of bonding electrons in a molecule of formaldehyde (H₂CO) is

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