Question 1

A double bond between two atoms,A and B,________.

Accepted Answer

A)  is longer than a single bond between the same two atoms.
B)  has a lower bond energy than a single bond between the same two atoms.
C)  arises when two electrons are transferred from A to B.
D)  consists of two electrons shared between A and B.
E)  consists of four electrons shared between A and B.F) C) and D)
G) B) and E)

Question 2

How many dots are present in the Lewis symbol for the fluorine atom?

Accepted Answer

A)  5
B)  6
C)  7
D)  8
E)  10F) A) and B)
G) All of the above

Question 3

Which of the following bonds would be the most polar?

Accepted Answer

A)  P-F
B)  N-F
C)  S-Cl
D)  Br-Br
E)  F-FF) C) and D)
G) A) and D)

Question 4

There are three atoms of iodine represented in the formula NaIO3.

Accepted Answer

A) True 
 B)False

Question 5

The drug "lithium" is often prescribed to treat mental illness.It is not the element lithium,but the ionic compound Li2CO3,that is actually administered.What is the name of this compound?

Accepted Answer

A)  dilithium carbon trioxide
B)  lithium carbide
C)  lithium carboxide
D)  lithium carbonate
E)  lithium tricarbonateF) D) and E)
G) A) and D)

Question 6

What is the formula of the ionic compound formed when ions of calcium and nitrogen combine?

Accepted Answer

A)  CaN
B)  CaN2
C)  Ca2N
D)  Ca3N2
E)  Ca2N3F) C) and E)
G) B) and D)

Question 7

What is the formula of the sulfate ion?

Accepted Answer

A)  SO4-
B)  SO3-
C)  SO42-
D)  SO32-
E)  SO22-F) B) and E)
G) A) and E)

Question 8

In the molecule BeF2,the beryllium atom is an exception to the octet rule.

Accepted Answer

A) True 
 B)False

Question 9

What is the formula of the compound sulfur trioxide?

Accepted Answer

A)  S3O
B)  SO3
C)  S(O2) 3
D)  S3O2
E)  S3O2?F) A) and D)
G) A) and C)

Question 10

In the molecule AX2,the central atom A has two lone pairs of electrons in addition to the two bond pairs in the A-X bonds.What is the shape of this molecule?

Accepted Answer

A)  bent,bond angle close to 109.5°
B)  bent,bond angle close to 120°
C)  linear
D)  trigonal planar
E)  trigonal pyramidalF) None of the above
G) B) and E)

Question 11

How many bonding electrons are present in the Lewis structure for the bicarbonate ion,shown below?

Accepted Answer

A)  4
B)  5
C)  8
D)  10
E)  24F) A) and E)
G) None of the above

Question 12

What is the Lewis structure of methanethiol,CH3SH?

Accepted Answer

A)  3SH? 
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C)  3SH? 
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D)  3SH? 
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G) A) and D)

Question 13

What is wrong with the Lewis structure shown for sulfur trioxide,SO3? 3?   A) Oxygen,not sulfur,should be the central atom. B) Sulfur should have 10 electrons around it instead of 8,to show its expanded octet. C) The structure shows 26 valence electrons,but there should only be 24. D) There are too many bonding electrons shown. E) The structure should show each oxygen atom with a double bond to the sulfur atom." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  Oxygen,not sulfur,should be the central atom.
B)  Sulfur should have 10 electrons around it instead of 8,to show its expanded octet.
C)  The structure shows 26 valence electrons,but there should only be 24.
D)  There are too many bonding electrons shown.
E)  The structure should show each oxygen atom with a double bond to the sulfur atom.F) A) and D)
G) A) and C)

Question 14

What is the name of Fe2(SO4) 3 in the Stock system?

Accepted Answer

A)  iron monosulfuric acid
B)  iron(II) sulfate
C)  iron(III) sulfate
D)  iron trisulfate
E)  iron(II) trisulfateF) A) and E)
G) B) and D)

Question 15

Baking soda consists of the ionic compound sodium bicarbonate.What is the formula of this compound?

Accepted Answer

A)  Na(CO3) 2
B)  Na2CO3
C)  NaBiCO3
D)  NaHCO3
E)  Na2HCO3F) B) and C)
G) B) and E)

Question 16

Which of the following Lewis structures has a possible resonance structure?

Accepted Answer

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

Question 17

What are the two principal classes of bonding called?

Accepted Answer

A)  ionic bonding and nuclear bonding
B)  covalent bonding and hydrogen bonding
C)  hydrogen bonding and ionic bonding
D)  polar bonding and ionic bonding
E)  ionic bonding and covalent bondingF) A) and B)
G) B) and E)

Question 18

What does it mean if an atom is said to have a high electronegativity?

Accepted Answer

A)  The atom requires a large amount of energy to remove an electron from its structure.
B)  The atom is highly susceptible to losing a valence electron.
C)  The atom has a strong attraction for electrons in a chemical bond.
D)  The atom releases a large amount of energy when it gains an electron.
E)  The atom has more electrons around it than necessary; the atom has an expanded octet.F) C) and E)
G) A) and B)

Question 19

Assuming reactions between the following pairs of elements,which pair is most likely to form a covalent compound?

Accepted Answer

A)  lithium and iodine
B)  sodium and oxygen
C)  calcium and chlorine
D)  copper and tin
E)  carbon and oxygenF) A) and C)
G) B) and C)

Question 20

Which formula represents ammonia?

Accepted Answer

A)  Al3
B)  AlH3
C)  NH4+
D)  NH3
E)  AN4F) B) and C)
G) A) and E)

Exam 3: Structure and Properties of Ionic and Covalent Compounds

What is the formula of the ionic compound formed when ions of calcium and nitrogen combine?

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What is the Lewis structure of methanethiol,CH3SH?

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How many dots are present in the Lewis symbol for the fluorine atom?

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In the molecule BeF2,the beryllium atom is an exception to the octet rule.

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What is the formula of the sulfate ion?

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Which formula represents ammonia?

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What are the two principal classes of bonding called?

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There are three atoms of iodine represented in the formula NaIO3.

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Which of the following Lewis structures has a possible resonance structure?

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Which of the following bonds would be the most polar?

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Baking soda consists of the ionic compound sodium bicarbonate.What is the formula of this compound?

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Assuming reactions between the following pairs of elements,which pair is most likely to form a covalent compound?

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In the molecule AX2,the central atom A has two lone pairs of electrons in addition to the two bond pairs in the A-X bonds.What is the shape of this molecule?

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The drug "lithium" is often prescribed to treat mental illness.It is not the element lithium,but the ionic compound Li2CO3,that is actually administered.What is the name of this compound?

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What does it mean if an atom is said to have a high electronegativity?

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A double bond between two atoms,A and B,________.

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What is the formula of the compound sulfur trioxide?

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What is the name of Fe2(SO4) 3 in the Stock system?

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How many bonding electrons are present in the Lewis structure for the bicarbonate ion,shown below?

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What is wrong with the Lewis structure shown for sulfur trioxide,SO3?

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What is the Lewis structure of methanethiol,CH₃SH?

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In the molecule BeF₂,the beryllium atom is an exception to the octet rule.

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There are three atoms of iodine represented in the formula NaIO₃.

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In the molecule AX₂,the central atom A has two lone pairs of electrons in addition to the two bond pairs in the A-X bonds.What is the shape of this molecule?

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The drug "lithium" is often prescribed to treat mental illness.It is not the element lithium,but the ionic compound Li₂CO₃,that is actually administered.What is the name of this compound?

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What is the name of Fe₂(SO₄) ₃ in the Stock system?

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What is wrong with the Lewis structure shown for sulfur trioxide,SO₃?

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