Question 1

In the electron configuration [Ar]4s23d104p4, which are valence electrons?

Accepted Answer

A)  All of the electrons after the [Ar]
B)  Only the 4 s 2 electrons
C)  Only the 3 d 10 electrons
D)  Only the 4 p 4 electrons
E)  Both the 4 s 2 and the 4 p 4 electronsF) A) and E)
G) All of the above

Question 2

Atomic size decreases across a period due to an increase in the effective nuclear charge, Zeff.

Accepted Answer

A) True 
 B)False

Question 3

"Each electron in an atom must have its own unique set of quantum numbers" is a statement of

Accepted Answer

A)  the aufbau principle.
B)  the Pauli exclusion principle.
C)  Hund's rule.
D)  the periodic law.
E)  Heisenberg's principle.F) A) and B)
G) None of the above

Question 4

Which of the following elements has the largest second ionization energy (IE2) ?

Accepted Answer

A)  Li
B)  B
C)  O
D)  F
E)  NaF) B) and C)
G) A) and E)

Question 5

Elements with __________ first ionization energies and __________ electron affinities generally form anions.

Accepted Answer

A)  low; very negative
B)  high; positive or slightly negative
C)  low; positive or slightly negative
D)  high; very negative
E)  None of these choices are correct.F) C) and D)
G) All of the above

Question 6

What is the correct order of decreasing size of the following ions?

Accepted Answer

A)  P 3− > Cl − > K + > Ca 2+
B)  Ca 2+ > K + > Cl − > P 3−
C)  K + > Cl − > Ca 2+ > P 3−
D)  K + > Cl − > P 3− > Ca 2+
E)  None of these choices are correct.F) A) and E)
G) A) and B)

Question 7

According to the exclusion principle, two is the maximum number of electrons in an atom which can share the same four quantum numbers.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following ions will be most likely to form when selenium ionizes?

Accepted Answer

A)  Se 6+
B)  Se 4+
C)  Se 2+
D)  Se 2−
E)  Se 4−F) B) and E)
G) B) and D)

Question 9

Which of the following has the most negative electron affinity?

Accepted Answer

A)  H
B)  Li
C)  Na
D)  K
E)  RbF) All of the above
G) A) and B)

Question 10

The most acidic oxides are formed from elements found in the __________ region of the periodic table.

Accepted Answer

A)  upper right
B)  upper left
C)  center
D)  lower right
E)  lower leftF) A) and E)
G) A) and B)

Question 11

Consider the element with the electron configuration: [Rn]7s25f7. How would you classify this element?

Accepted Answer

A)  A representative element
B)  A transition metal
C)  A nonmetal
D)  An actinide element
E)  A noble gasF) None of the above
G) C) and E)

Question 12

Electron affinities become increasingly positive toward the right hand end of a period.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following fourth-period elements has the smallest atomic radius?

Accepted Answer

A)  K
B)  Ti
C)  Cu
D)  Ge
E)  KrF) C) and D)
G) A) and E)

Question 14

Elements with __________ first ionization energies and__________ electron affinities generally form cations.

Accepted Answer

A)  low; very negative
B)  high; positive or slightly negative
C)  low; positive or slightly negative
D)  high; very negative
E)  None of these choices are correct.F) A) and E)
G) A) and C)

Question 15

Which of the following elements has the largest first ionization energy?

Accepted Answer

A)  Na
B)  Cl
C)  Ca
D)  Te
E)  BrF) A) and E)
G) C) and D)

Question 16

Which one of the following oxides does not react with water to form acid solutions?

Accepted Answer

A)  CO 2
B)  SO 3
C)  BaO
D)  NO 2
E)  Cl 2O 7F) All of the above
G) None of the above

Question 17

Electron affinities of neutral atoms may be positive or negative.

Accepted Answer

A) True 
 B)False

Exam 8: Electron Configuration and Chemical Periodicity

Which of the following elements has the largest first ionization energy?

Correct Answer
verified

In the electron configuration [Ar]4s²3d¹⁰4p⁴, which are valence electrons?

Correct Answer
verified

Which of the following has the most negative electron affinity?

Correct Answer
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"Each electron in an atom must have its own unique set of quantum numbers" is a statement of

Correct Answer
verified

Which of the following fourth-period elements has the smallest atomic radius?

Correct Answer
verified

According to the exclusion principle, two is the maximum number of electrons in an atom which can share the same four quantum numbers.

Correct Answer
verified

Elements with first ionization energies and electron affinities generally form cations.

Correct Answer
verified

Which of the following ions will be most likely to form when selenium ionizes?

Correct Answer
verified

Electron affinities of neutral atoms may be positive or negative.

Correct Answer
verified

Electron affinities become increasingly positive toward the right hand end of a period.

Correct Answer
verified

The most acidic oxides are formed from elements found in the __________ region of the periodic table.

Correct Answer
verified

Atomic size decreases across a period due to an increase in the effective nuclear charge, Z_eff.

Correct Answer
verified

Which of the following elements has the largest second ionization energy (IE₂) ?

Correct Answer
verified

What is the correct order of decreasing size of the following ions?

Correct Answer
verified

Consider the element with the electron configuration: [Rn]7s25f7. How would you classify this element?

Correct Answer
verified

Elements with first ionization energies and electron affinities generally form anions.

Correct Answer
verified

Which one of the following oxides does not react with water to form acid solutions?

Correct Answer
verified

Exam 8: Electron Configuration and Chemical Periodicity

Which of the following elements has the largest first ionization energy?

Correct AnswerverifiedShow Answer

In the electron configuration [Ar]4s23d104p4, which are valence electrons?

Correct AnswerverifiedShow Answer

Which of the following has the most negative electron affinity?

Correct AnswerverifiedShow Answer

"Each electron in an atom must have its own unique set of quantum numbers" is a statement of

Correct AnswerverifiedShow Answer

Which of the following fourth-period elements has the smallest atomic radius?

Correct AnswerverifiedShow Answer

According to the exclusion principle, two is the maximum number of electrons in an atom which can share the same four quantum numbers.

Correct AnswerverifiedShow Answer

Elements with __________ first ionization energies and__________ electron affinities generally form cations.

Correct AnswerverifiedShow Answer

Which of the following ions will be most likely to form when selenium ionizes?

Correct AnswerverifiedShow Answer

Electron affinities of neutral atoms may be positive or negative.

Correct AnswerverifiedShow Answer

Electron affinities become increasingly positive toward the right hand end of a period.

Correct AnswerverifiedShow Answer

The most acidic oxides are formed from elements found in the __________ region of the periodic table.

Correct AnswerverifiedShow Answer

Atomic size decreases across a period due to an increase in the effective nuclear charge, Zeff.

Correct AnswerverifiedShow Answer

Which of the following elements has the largest second ionization energy (IE2) ?

Correct AnswerverifiedShow Answer

What is the correct order of decreasing size of the following ions?

Correct AnswerverifiedShow Answer

Consider the element with the electron configuration: [Rn]7s25f7. How would you classify this element?

Correct AnswerverifiedShow Answer

Elements with __________ first ionization energies and __________ electron affinities generally form anions.

Correct AnswerverifiedShow Answer

Which one of the following oxides does not react with water to form acid solutions?

Correct AnswerverifiedShow Answer

Correct Answer
verified

In the electron configuration [Ar]4s²3d¹⁰4p⁴, which are valence electrons?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Elements with first ionization energies and electron affinities generally form cations.

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

Atomic size decreases across a period due to an increase in the effective nuclear charge, Z_eff.

Correct Answer
verified

Which of the following elements has the largest second ionization energy (IE₂) ?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Elements with first ionization energies and electron affinities generally form anions.

Correct Answer
verified

Correct Answer
verified