Question 1

Concerning the electron configuration of aluminum, 1s22s22p63s23p1, which of the following represents the valence electrons only?

Accepted Answer

A)  1s2
B)  1s22s2
C)  1s22s22p6
D)  1s22s22p63s2
E)  3s23p1F) C) and E)
G) None of the above

Question 2

How many valence electrons does S2- have?

Accepted Answer

A)  2
B)  4
C)  6
D)  16
E)  8F) A) and E)
G) A) and D)

Question 3

The radii of ions are always smaller than the radii of the corresponding atoms of the same element.

Accepted Answer

A) True 
 B)False

Question 4

The effective nuclear charge (Zeff) felt by the outermost electrons is the strongest for which of the following elements?

Accepted Answer

A)  B
B)  C
C)  N
D)  O
E)  FF) D) and E)
G) A) and B)

Question 5

What are the products of the following reaction? 2Al(s) + 6H+(aq)  →\rarr→

Accepted Answer

A)  2Al3+(aq) + 3H2(g) 
B)  2Al2+(aq) + 3H2(g) 
C)  2AlH2(s) + H2(g) 
D)  2Al+(aq) + 3H2(g) 
E)  2AlH3(s)  F) All of the above
G) B) and D)

Question 6

For which of the following reactions is the enthalpy change equal to the second ionization energy of nitrogen?

Accepted Answer

A)  N2+(g)  →\rarr→ N3+(g) + e-
B)  N2+(g) + e-  →\rarr→  N+(g) 
C)  N(g)  →\rarr→  N2+(g) + 2e-
D)  N-(g) + e-  →\rarr→  N2-(g) 
E)  N+(g)  →\rarr→ N2+(g) + e- F) None of the above
G) B) and D) E

Question 7

Consider the element with the electron configuration [Xe]6s24f7.This element is

Accepted Answer

A)  a representative element
B)  a lanthanide element
C)  a nonmetal
D)  an actinide element
E)  a noble gasF) B) and C)
G) B) and D)

Question 8

Why is the Mg2+ ion smaller than F-, even though they are isoelectronic?

Accepted Answer

Mg²⁺ has a h...

Question 9

Consider the following reaction 2A + 3F2  →\rarr→ 2AF3.What is the formula for the reaction product if we substitute iodine for fluorine?

Accepted Answer

A)  A2I3
B)  A3I2
C)  AI3
D)  A3I
E)  AI F) C) and D)
G) B) and E)

Question 10

The representative elements are those with unfilled energy levels in which the "last electron" was added to

Accepted Answer

A)  an s orbital.
B)  an s or p orbital.
C)  a d orbital.
D)  a p or d orbital.
E)  an f orbital.F) All of the above
G) B) and E) B

Question 11

How many 3d electrons does the manganese(II) ion, Mn2+, have?

Accepted Answer

A)  3
B)  4
C)  5
D)  6
E)  7F) B) and C)
G) A) and D)

Question 12

Which one of the following elements is a Lanthanide?

Accepted Answer

A)  U
B)  Ce
C)  Os
D)  Bi
E)  CsF) A) and E)
G) All of the above

Question 13

Which of the following is the electron configuration of the iron(III) ion?

Accepted Answer

A)  [Ar]3d5
B)  [Ar]4s13d5
C)  [Ar]4s23d3
D)  [Ar]3d6
E)  [Ar]4s23d9F) A) and B)
G) C) and E)

Question 14

Which of the following elements has the greatest electron affinity (largest positive value) ?

Accepted Answer

A)  Mg
B)  Al
C)  Si
D)  P
E)  SF) C) and D)
G) A) and D)

Question 15

Which of the following elements has the greatest metallic character?

Accepted Answer

A)  Br
B)  Se
C)  Ni
D)  As
E)  SiF) A) and C)
G) B) and C)

Question 16

What are the products of the following reaction? 2 Li(s) + 2H2O(l)  →\rarr→

Accepted Answer

A)  Li2O2(s) + 2 H2(g) 
B)  2Li2O(s) + 2 H2(g) 
C)  2 LiOH(aq) + H2(g) 
D)  2 Li(s) + 2H2O(l) 
E)  LiO2(s) + 2H2(g)  F) None of the above
G) B) and D) C

Question 17

Which of the following atoms has the greatest electron affinity (largest positive value) ?

Accepted Answer

A)  S
B)  P
C)  Ga
D)  Li
E)  BrF) A) and B)
G) B) and E)

Question 18

The elements in Group 7A are known by what name?

Accepted Answer

A)  transition metals
B)  halogens
C)  alkali metals
D)  alkaline earth metals
E)  noble gasesF) B) and D)
G) A) and C)

Question 19

Arrange the following ions in order of decreasing ionic radius: Al3+, Mg2+, Na+, O2-. decreasing radius  →\rarr→

Accepted Answer

A)  Al3+ > Mg2+ > O2- > Na+
B)  Al3+ > Mg2+ > Na+ > O2-
C)  Na+ > Mg2+ > Al3+ > O2-
D)  O2- > Al3+ > Mg2+ > Na+
E)  O2- > Na+ > Mg2+ > Al3+ F) B) and D)
G) B) and E)

Question 20

Which one of the following is not isoelectronic with Kr?

Accepted Answer

A)  As3+
B)  Se2-
C)  Rb+
D)  Sr2+
E)  Br-F) B) and D)
G) C) and E)

Exam 8: Periodic Relationships Among the Elements

Concerning the electron configuration of aluminum, 1s22s22p63s23p1, which of the following represents the valence electrons only?

Correct AnswerverifiedShow Answer

How many valence electrons does S2- have?

Correct AnswerverifiedShow Answer

The radii of ions are always smaller than the radii of the corresponding atoms of the same element.

Correct AnswerverifiedShow Answer

The effective nuclear charge (Zeff) felt by the outermost electrons is the strongest for which of the following elements?

Correct AnswerverifiedShow Answer

What are the products of the following reaction? 2Al(s) + 6H+(aq) →\rarr→

Correct AnswerverifiedShow Answer

For which of the following reactions is the enthalpy change equal to the second ionization energy of nitrogen?

Correct AnswerverifiedE

Consider the element with the electron configuration [Xe]6s24f7.This element is

Correct AnswerverifiedShow Answer

Why is the Mg2+ ion smaller than F-, even though they are isoelectronic?

Correct AnswerverifiedMg2+ has a h...View AnswerShow Answer

Consider the following reaction 2A + 3F2 →\rarr→ 2AF3.What is the formula for the reaction product if we substitute iodine for fluorine?

Correct AnswerverifiedShow Answer

The representative elements are those with unfilled energy levels in which the "last electron" was added to

Correct AnswerverifiedB

How many 3d electrons does the manganese(II) ion, Mn2+, have?

Correct AnswerverifiedShow Answer

Which one of the following elements is a Lanthanide?

Correct AnswerverifiedShow Answer

Which of the following is the electron configuration of the iron(III) ion?

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Which of the following elements has the greatest electron affinity (largest positive value) ?

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Which of the following elements has the greatest metallic character?

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What are the products of the following reaction? 2 Li(s) + 2H2O(l) →\rarr→

Correct AnswerverifiedC

Which of the following atoms has the greatest electron affinity (largest positive value) ?

Correct AnswerverifiedShow Answer

The elements in Group 7A are known by what name?

Correct AnswerverifiedShow Answer

Arrange the following ions in order of decreasing ionic radius: Al3+, Mg2+, Na+, O2-. decreasing radius →\rarr→

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Which one of the following is not isoelectronic with Kr?

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Concerning the electron configuration of aluminum, 1s²2s²2p⁶3s²3p¹, which of the following represents the valence electrons only?

Correct Answer
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How many valence electrons does S^2- have?

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The effective nuclear charge (Z_eff) felt by the outermost electrons is the strongest for which of the following elements?

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What are the products of the following reaction? 2Al(s) + 6H⁺(aq) $\rarr$

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E

Consider the element with the electron configuration [Xe]6s²4f⁷.This element is

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Why is the Mg²⁺ ion smaller than F^-, even though they are isoelectronic?

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Mg²⁺ has a h...
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Consider the following reaction 2A + 3F₂ $\rarr$ 2AF₃.What is the formula for the reaction product if we substitute iodine for fluorine?

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B

How many 3d electrons does the manganese(II) ion, Mn²⁺, have?

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What are the products of the following reaction? 2 Li(s) + 2H₂O(l) $\rarr$

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C

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Arrange the following ions in order of decreasing ionic radius: Al³⁺, Mg²⁺, Na⁺, O^2-. decreasing radius $\rarr$

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