Question 1

What is the name of the compound whose formula is CCl4?

Accepted Answer

A)  carbon tetrachloride
B)  carbon(IV)  chloride
C)  carbon chloride
D)  carbotetrachloride
E)  carbonate tetrachlorideF) A) and D)
G) A) and E)

Question 2

In Lewis symbols, the chemical symbol of an element represents both the nucleus and the lower energy (nonvalence) electrons.

Accepted Answer

A) True 
 B)False

Question 3

Which formula represents ammonia?

Accepted Answer

A)  Al3
B)  AlH3
C)  NH4+
D)  NH3
E)  AN4F) B) and C)
G) None of the above

Question 4

In what region on the periodic table are elements with the lowest electronegativity values found?

Accepted Answer

A)  upper right corner
B)  bottom right corner
C)  upper left corner
D)  bottom left corner
E)  middleF) B) and C)
G) A) and E)

Question 5

As a rule, ionic compounds tend to have lower melting and boiling points than covalent compounds consisting of small molecules.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following would NOT describe the Lewis structure of PF3?

Accepted Answer

A)  The Lewis structure has a double bond between phosphorus and one of the fluorine atoms.
B)  No resonance structures can be drawn.
C)  The molecule has a lone pair (nonbonding pair)  on the central atom.
D)  The Lewis structure has 26 valence electrons.
E)  The Lewis structure is not an exception to the octet rule.F) A) and E)
G) A) and C)

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

A covalent bond is formed when

Accepted Answer

A)  two metals share a pair of electrons.
B)  a metal and a nonmetal share a pair of electrons.
C)  a nonmetal donates an electron to a metal.
D)  cations and anions join as an ion pair.
E)  two nonmetals share a pair of electrons.F) A) and B)
G) B) and C)

Question 9

Which Lewis symbol for an ion is incorrect?

Accepted Answer

A)  [Na]+
B)  [Ca]2+
C)  [Sn]4+
D)   + 
B)  [Ca]2+ 
C)  [Sn]4+ 
D)     
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E)   + 
B)  [Ca]2+ 
C)  [Sn]4+ 
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) A) and C)
G) B) and E)

Question 10

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) A) and E)
G) None of the above

Question 11

Which element has the greatest electronegativity?

Accepted Answer

A)  H
B)  Cl
C)  O
D)  F
E)  NaF) B) and C)
G) A) and E)

Question 12

Predict the formula of the compound formed when ions of sodium and sulfur combine.

Accepted Answer

A)  Na2S
B)  NaS2
C)  NaS
D)  Na2S2
E)  Na3SF) B) and E)
G) D) and E)

Question 13

Which statement about general bonding characteristics is FALSE?

Accepted Answer

A)  Bond energy is the amount of energy required to break a bond holding two atoms together.
B)  Bond length is the distance of separation of two nuclei in a covalent bond.
C)  Triple bonds have higher bond energies than double bonds.
D)  Single bonds are easier to break than double bonds.
E)  A triple bond is longer than a single bond.F) A) and C)
G) B) and E)

Question 14

Which properly represents the Lewis structure of hydrogen sulfide, H2S?

Accepted Answer

A)   2S? 
A)     
B)     
C)     
D)     
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B)   2S? 
A)     
B)     
C)     
D)     
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C)   2S? 
A)     
B)     
C)     
D)     
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D)   2S? 
A)     
B)     
C)     
D)     
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E)   2S? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) C) and E)
G) A) and E)

Question 15

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

Accepted Answer

A)  copper and tin
B)  chlorine and oxygen
C)  cesium and iodine
D)  carbon and chlorine
E)  fluorine and iodineF) All of the above
G) A) and B)

Question 16

What is the formula of iron(III)  bromide?

Accepted Answer

A)  Fe(Br2) 3
B)  Fe3Br
C)  Fe3Br3
D)  FeBr3
E)  Fe2Br3F) A) and D)
G) A) and E)

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

What is the Lewis structure of methanethiol, CH3SH?

Accepted Answer

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

Question 19

What kind of bond results when electron transfer occurs between atoms of two different elements?

Accepted Answer

A)  ionic
B)  covalent
C)  nonpolar
D)  single
E)  doubleF) D) and E)
G) B) and C)

Question 20

The NO molecule can never satisfy the octet rule.

Accepted Answer

A) True 
 B)False

Exam 3: Structure and Properties of Ionic and Covalent Compounds

What is the name of the compound whose formula is CCl4?

Correct AnswerverifiedShow Answer

Predict the formula of the compound formed when ions of sodium and sulfur combine.

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Which of the following bonds would be the most polar?

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What is the formula of iron(III) bromide?

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A covalent bond is formed when

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In Lewis symbols, the chemical symbol of an element represents both the nucleus and the lower energy (nonvalence) electrons.

Correct AnswerverifiedShow Answer

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

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What kind of bond results when electron transfer occurs between atoms of two different elements?

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

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Which statement about general bonding characteristics is FALSE?

Correct AnswerverifiedShow Answer

Which formula represents ammonia?

Correct AnswerverifiedShow Answer

As a rule, ionic compounds tend to have lower melting and boiling points than covalent compounds consisting of small molecules.

Correct AnswerverifiedShow Answer

What is the Lewis structure of methanethiol, CH3SH?

Correct AnswerverifiedShow Answer

The NO molecule can never satisfy the octet rule.

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Which element has the greatest electronegativity?

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Which properly represents the Lewis structure of hydrogen sulfide, H2S?

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In what region on the periodic table are elements with the lowest electronegativity values found?

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Which of the following would NOT describe the Lewis structure of PF3?

Correct AnswerverifiedShow Answer

Which Lewis symbol for an ion is incorrect?

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

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What is the name of the compound whose formula is CCl₄?

Correct Answer
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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 Lewis structure of methanethiol, CH₃SH?

Correct Answer
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Which properly represents the Lewis structure of hydrogen sulfide, H₂S?

Correct Answer
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Which of the following would NOT describe the Lewis structure of PF₃?

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

Correct Answer
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