Question 1

Which of the following formulas does not represent a stable compound?

Accepted Answer

A)  N 2O
B)  NO
C)  NO 2
D)  NO 3
E)  N 2O 4F) A) and E)
G) A) and D)

Question 2

The elements from Groups 1A(1)  and 2A(2)  are

Accepted Answer

A)  strong acids.
B)  strong bases.
C)  amphoteric.
D)  strong oxidizing agents.
E)  strong reducing agents.F) A) and E)
G) A) and D)

Question 3

Which element forms compounds, e.g., Teflon, which are used as coatings for other substances?

Accepted Answer

A)  Boron
B)  Beryllium
C)  Fluorine
D)  Nitrogen
E)  SodiumF) A) and B)
G) None of the above

Question 4

Phosphoric acid (H3PO4) is a strong acid.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following oxides is most basic?

Accepted Answer

A)  As 2O 3
B)  P 4O 10
C)  Sb 2O 3
D)  Sb 2O 5
E)  NO 2F) B) and D)
G) B) and C)

Question 6

Certain Period 2 elements exhibit behaviors similar to Period 3 elements immediately below and to the right. One of these interesting diagonal relationships occurs between lithium and magnesium. Which of the following is one of their similarities?

Accepted Answer

A)  They both form insoluble carbonate salts.
B)  Both elements are important in treating manic-depression.
C)  Their first ionization energies are almost equal.
D)  Their densities are very similar.
E)  They both form organic compounds with polar covalent bonds from the metal to hydrocarbon group.F) D) and E)
G) A) and E)

Question 7

Which of the following pairs of elements will form the longest single bond?

Accepted Answer

A)  C, F
B)  C, N
C)  C, S
D)  C, O
E)  C, HF) B) and E)
G) None of the above

Question 8

Which one of the following trends occurs as one moves down the group 1A (1)  elements from Li to Cs?

Accepted Answer

A)  Metallic character decreases
B)  Electronegativity increases
C)  Melting point increases
D)  First ionization energy increases
E)  Chemical reactivity increasesF) C) and D)
G) A) and D)

Question 9

Predict the products for the following set of reactants. Bi(s)  + Cl2(g)  →

Accepted Answer

A)  BiCl
B)  BiCl 2
C)  BiCl 3
D)  BiCl 4
E)  BiCl 5F) A) and E)
G) B) and E)

Question 10

The acidity of oxides of main group elements increases down a group, from top to bottom.

Accepted Answer

A) True 
 B)False

Question 11

The acidity of oxides of main group elements increases across a period from left to right.

Accepted Answer

A) True 
 B)False

Question 12

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

Accepted Answer

A)  (CH 3) 3As( g) + GaH 3( g) 
B)  CH 4( g) + GaAs( s) 
C)  CH 3CH 3( g) + GaAs( s) 
D)  CH 4( g) + H 2GaAs( s) 
E)  CH 3H( g) + GaAs( s) F) B) and E)
G) D) and E)

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

Which of the alkali metals has the highest melting point?

Accepted Answer

A)  Li
B)  Na
C)  K
D)  Rb
E)  CsF) A) and B)
G) A) and C)

Question 15

Predict the products for the following set of reactants. K2O(s)  + H2O(l)  →

Accepted Answer

A)  K +( aq) + OH −( aq) + H 2( g) 
B)  K +( aq) + OH −( aq) 
C)  K +( aq) + H 2( g) + O 2( g) 
D)  KH( s) + O 2( g) 
E)  K +( aq) + OH −( aq) + H 2O 2( aq) F) B) and D)
G) C) and D)

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

Consider all of the known elements. Which element has the greatest ability to covalently bond to itself and to form multiple bonds?

Accepted Answer

A)  Al
B)  B
C)  C
D)  Si
E)  HF) B) and D)
G) B) and C)

Question 18

Which of the following elements has the lowest electronegativity?

Accepted Answer

A)  Al
B)  S
C)  Mg
D)  In
E)  BaF) B) and D)
G) All of the above

Question 19

Predict the product(s)  for the reaction of the following set of reactants. Ca(s)  + H2(g)  →

Accepted Answer

A)  CaH( s) 
B)  CaH 2( s) 
C)  Ca 2H 3( s) 
D)  Ca 3H 2( s) 
E)  None of these choices are correct.F) B) and D)
G) None of the above

Question 20

Which of the following statements about the effective nuclear charge, Zeff, is correct?

Accepted Answer

A)  Z eff increases with the size of the atom.
B)  Z eff decreases across a period and increases down a group.
C)  Z eff increases across a period and is relatively constant down a group.
D)  Z eff increases as the value of the principal quantum number increases.
E)  Z eff is greater for hydrogen than for any other element.F) A) and D)
G) B) and E)

Exam 14: Periodic Patterns in the Main-Group Elements

Which of the following pairs of elements will form the longest single bond?

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Predict the product(s) for the reaction of the following set of reactants. Ca(s) + H2(g) →

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Which one of the following trends occurs as one moves down the group 1A (1) elements from Li to Cs?

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

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Which element forms compounds, e.g., Teflon, which are used as coatings for other substances?

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The acidity of oxides of main group elements increases down a group, from top to bottom.

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Which of the following elements has the lowest electronegativity?

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Which of the following statements about the effective nuclear charge, Zeff, is correct?

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Which of the following formulas does not represent a stable compound?

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Predict the products for the following set of reactants. K2O(s) + H2O(l) →

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The elements from Groups 1A(1) and 2A(2) are

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Consider all of the known elements. Which element has the greatest ability to covalently bond to itself and to form multiple bonds?

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Which of the following oxides is most basic?

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

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Predict the products for the following set of reactants. Bi(s) + Cl2(g) →

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Phosphoric acid (H3PO4) is a strong acid.

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Which of the alkali metals has the highest melting point?

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

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The acidity of oxides of main group elements increases across a period from left to right.

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Certain Period 2 elements exhibit behaviors similar to Period 3 elements immediately below and to the right. One of these interesting diagonal relationships occurs between lithium and magnesium. Which of the following is one of their similarities?

Correct AnswerverifiedShow Answer

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Predict the product(s) for the reaction of the following set of reactants. Ca(s) + H₂(g) →

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

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Which of the following statements about the effective nuclear charge, Z_eff, is correct?

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Predict the products for the following set of reactants. K₂O(s) + H₂O(l) →

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Predict the products for the following set of reactants. Bi(s) + Cl₂(g) →

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Phosphoric acid (H₃PO₄) is a strong acid.

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

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