Question 1

Name the three allotropes of carbon and briefly describe their properties and structures.

Accepted Answer

Graphite is the stablest allotrope under...

Question 2

In the gas phase, AlCl3 exists as molecules of Al2Cl6.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following atoms has the smallest volume?

Accepted Answer

A)   Ba
B)   Cs
C)   Sr
D)   Rb
E)   IF) B) and C)
G) D) and E)

Question 4

Predict the products for the following set of reactants. 
Li(s)  + CH3Cl(g)   →\rightarrow→

Accepted Answer

A)   CH3CH3(g)  + LiCl(s) 
B)   CH4(g)  + LiCl(s) 
C)   CH3Li(s)  + LiCl(s) 
D)   CH3Li(s)  + Cl2(g) 
E)   CH2Li(s)  + HCl(g)  F) B) and E)
G) B) and D)

Question 5

What are the products of the following reaction of strontium hydride and water? 
SrH2(s)  + H2O(l)   →\rightarrow→

Accepted Answer

A)   Sr2+(aq)  + H2(g)  + O2(g) 
B)   Sr2+(aq)  + H2(g)  + OH¯(aq) 
C)   Sr(s)  + H2(g)  + OH¯(aq) 
D)   Sr(s)  + H3O+(aq) 
E)   None of these choices is correct. F) C) and E)
G) A) and C)

Question 6

The largest electronegativities are found in the _____________ ____________ region of the periodic table.

Accepted Answer

A)   upper left
B)   upper right
C)   lower left
D)   lower right
E)   transition element (d-block) F) A) and C)
G) A) and E)

Question 7

Predict the products for the reaction of the following set of reactants. (CH3) 3Ga(g)  + AsH3(g)   →\rightarrow→

Accepted Answer

A)   (CH3) 3As(g)  + GaH3(g) 
B)   CH4(g)  + GaAs(s) 
C)   CH3CH3(g)  + GaAs(s) 
D)   CH4(g)  + H2GaAs(s) 
E)   CH3H(g)  + GaAs(s)  F) A) and B)
G) C) and D)

Question 8

What are the products of the reaction of potassium hydride and water? 
KH(s)  + H2O(l)   →\rightarrow→

Accepted Answer

A)   K(s)  + H2(g)  + OH¯(aq) 
B)   K(s)  + H2(g)  + O2(g) 
C)   KOH(s)  + O2(g) 
D)   K+(aq)  + H2(g)  + O2(g) 
E)   K+(aq)  + H2(g)  + OH¯(aq)  F) A) and B)
G) B) and C)

Question 9

Write balanced equations, showing all reactants and products, to represent
a. the reaction of calcium metal with water.
b. the reaction of aluminum metal with oxygen gas.

Accepted Answer

The answer of Write balanced equations, showing all reactants and...

Question 10

Neon does not form any known compounds.

Accepted Answer

A) True 
 B)False

Question 11

The nitrate anion is

Accepted Answer

A)   a strong acid.
B)   a strong base.
C)   amphoteric.
D)   a strong reducing agent.
E)   a strong oxidizing agent.F) A) and E)
G) A) and D)

Question 12

Which of the following bonds should have the greatest ionic character?

Accepted Answer

A)   O  F
B)   N  F
C)   C  F
D)   B  − - −  F
E)   Cl  − - −  F F) A) and B)
G) A) and C)

Question 13

Predict the products for the reaction of the following set of reactants. 
Sr(s)  + H2O(l)   →\rightarrow→

Accepted Answer

A)   SrO(s)  + H2(g) 
B)   Sr2+(aq)  + H2(g)  + O2(g) 
C)   Sr2+(aq)  + H3O+(aq) 
D)   Sr(OH) 2(s)  + H2(g) 
E)   SrH2(s)  + O2(g)  F) A) and C)
G) None of the above D

Question 14

Potassium is a strong reducing agent.

Accepted Answer

A) True 
 B)False  True

Question 15

Nitric acid, HNO3

Accepted Answer

A)   is a strong reducing agent.
B)   is a weak oxidizing agent.
C)   does not react with copper metal.
D)   may react with copper metal to produce NO gas.
E)   reacts with metal hydroxides to produce nitrite salts.F) A) and B)
G) A) and C)

Question 16

The polymers containing silicon differ from polymers of carbon in which of the following ways?

Accepted Answer

A)   Silicon-based polymers are larger molecules than carbon-based polymers.
B)   Silicon-based polymers generally have a repeating silicon-oxygen link while carbon-based polymers can have carbon-carbon links.
C)   Silicon-based polymers generally have inorganic elements attached to the chain while carbon-based polymers generally have organic groups attached.
D)   Silicon-based polymers tend to be rigid while carbon-based polymers are generally flexible.
E)   Silicon forms stronger bonds than carbon.F) C) and E)
G) C) and D)

Question 17

Predict the products for the following set of reactants. 
Ca3As2(s)  + H2O(l)   →\rightarrow→

Accepted Answer

A)   As3+(aq)  + Ca(OH) 2(aq) 
B)   As(OH) 3(s)  + Ca2+(aq)  + H2(g) 
C)   As(OH) 3(s)  + Ca(OH) 2(aq) 
D)   AsH3(g)  + Ca(OH) 2(aq) 
E)   CaH2(aq)  + As2O3(aq)  F) B) and C)
G) A) and B)

Question 18

Group 1A elements are less reactive than group 2A elements.

Accepted Answer

A) True 
 B)False

Question 19

Bromine will form compounds with each of the other elements in Period 4 of the periodic table. How does the type of bonding in the compounds change as one moves from potassium bromide to selenium bromide?

Accepted Answer

A)   ionic to polar covalent
B)   polar covalent to ionic
C)   polar covalent to non-polar covalent
D)   coordinate covalent to polar covalent
E)   None of these choices is correct.F) A) and D)
G) A) and E)

Question 20

The basic character of the binary oxides XmOn

Accepted Answer

A)   is greatest when X has a low atomic number.
B)   is greatest when X is a nonmetal.
C)   increases as the oxidation number of X increases.
D)   increases as the oxidation number of X decreases.
E)   is unaffected by the oxidation number of X.F) B) and D)
G) A) and D) D

Exam 14: Periodic Patterns in the Main-Group Elements

Name the three allotropes of carbon and briefly describe their properties and structures.

Correct AnswerverifiedGraphite is the stablest allotrope under...View AnswerShow Answer

In the gas phase, AlCl3 exists as molecules of Al2Cl6.

Correct AnswerverifiedShow Answer

Which of the following atoms has the smallest volume?

Correct AnswerverifiedShow Answer

Predict the products for the following set of reactants. Li(s) + CH3Cl(g) →\rightarrow→

Correct AnswerverifiedShow Answer

What are the products of the following reaction of strontium hydride and water? SrH2(s) + H2O(l) →\rightarrow→

Correct AnswerverifiedShow Answer

The largest electronegativities are found in the _____________ ____________ region of the periodic table.

Correct AnswerverifiedShow Answer

Predict the products for the reaction of the following set of reactants. (CH3) 3Ga(g) + AsH3(g) →\rightarrow→

Correct AnswerverifiedShow Answer

What are the products of the reaction of potassium hydride and water? KH(s) + H2O(l) →\rightarrow→

Correct AnswerverifiedShow Answer

Write balanced equations, showing all reactants and products, to represent a. the reaction of calcium metal with water. b. the reaction of aluminum metal with oxygen gas.

Correct AnswerverifiedShow Answer

Neon does not form any known compounds.

Correct AnswerverifiedShow Answer

The nitrate anion is

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Which of the following bonds should have the greatest ionic character?

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Predict the products for the reaction of the following set of reactants. Sr(s) + H2O(l) →\rightarrow→

Correct AnswerverifiedD

Potassium is a strong reducing agent.

Correct AnswerverifiedTrue

Nitric acid, HNO3

Correct AnswerverifiedShow Answer

The polymers containing silicon differ from polymers of carbon in which of the following ways?

Correct AnswerverifiedShow Answer

Predict the products for the following set of reactants. Ca3As2(s) + H2O(l) →\rightarrow→

Correct AnswerverifiedShow Answer

Group 1A elements are less reactive than group 2A elements.

Correct AnswerverifiedShow Answer

Bromine will form compounds with each of the other elements in Period 4 of the periodic table. How does the type of bonding in the compounds change as one moves from potassium bromide to selenium bromide?

Correct AnswerverifiedShow Answer

The basic character of the binary oxides XmOn

Correct AnswerverifiedD

Correct Answer
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Graphite is the stablest allotrope under...
View Answer

In the gas phase, AlCl₃ exists as molecules of Al₂Cl₆.

Correct Answer
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Predict the products for the following set of reactants. Li(s) + CH₃Cl(g) $\rightarrow$

Correct Answer
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What are the products of the following reaction of strontium hydride and water? SrH₂(s) + H₂O(l) $\rightarrow$

Correct Answer
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The largest electronegativities are found in the _ region of the periodic table.

Correct Answer
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Predict the products for the reaction of the following set of reactants. (CH₃) ₃Ga(g) + AsH₃(g) $\rightarrow$

Correct Answer
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What are the products of the reaction of potassium hydride and water? KH(s) + H₂O(l) $\rightarrow$

Correct Answer
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Correct Answer
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Predict the products for the reaction of the following set of reactants. Sr(s) + H₂O(l) $\rightarrow$

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D

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True

Nitric acid, HNO₃

Correct Answer
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Predict the products for the following set of reactants. Ca₃As₂(s) + H₂O(l) $\rightarrow$

Correct Answer
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The basic character of the binary oxides X_mO_n

Correct Answer
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D