Question 1

The electronic structure 1s22s22p63s23p64s23d8 refers to the ground state of

Accepted Answer

A)   Kr.
B)   Ni.
C)   Fe.
D)   Pd.
E)   None of these choices are correct.F) B) and E)
G) A) and B)

Question 2

The most basic 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) C) and D)
G) A) and C)

Question 3

Which of the following atoms will be diamagnetic?

Accepted Answer

A)   Cr
B)   Ru
C)   Fe
D)   Pt
E)   CdF) C) and D)
G) A) and B)

Question 4

Select the correct set of quantum numbers (n, l, ml, ms)  for the highest energy electron in the ground state of tin, Sn.

Accepted Answer

A)   5, 2, -1, ½
B)   5, 2, 0, ½
C)   5, 1, 2, ½
D)   5, 1, 0, ½
E)   5, 2, 1, ½F) A) and D)
G) A) and C)

Question 5

How many valence electrons are there in an atom with the electron configuration [noble gas]ns2(n - 1) d8?

Accepted Answer

A)   2
B)   6
C)   8
D)   10
E)   None of these choices are correct.F) A) and C)
G) D) and E)

Question 6

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

Accepted Answer

A)   all of the electrons after the [Ar]
B)   only the 4s2 electrons
C)   only the 3d10 electrons
D)   only the 4p4 electrons
E)   both the 4s2 and the 4p4 electronsF) A) and E)
G) A) and D)

Question 7

Select the correct electron configuration for Cu (Z = 29) .

Accepted Answer

A)   [Ar]4s23d9
B)   [Ar]4s13d10
C)   [Ar]4s24p63d3
D)   [Ar]4s24d9
E)   [Ar]5s24d9F) A) and B)
G) B) and D)

Question 8

"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 E)
G) C) and E)

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

Which of the following electron configurations is not possible for an atom in an excited state?

Accepted Answer

A)   1s22s22p63s23p63d104s14p1
B)   1s22s22p63s13p5
C)   1s22s22p63s23p23d2
D)   1s22s22p63s23p63d104s2
E)   1s22s22p63s23p63d104s14p3F) A) and C)
G) D) and E)

Question 11

Which of the following electron configurations is correct for the excited state of an element?

Accepted Answer

A)   [He]2s22p5
B)   [Ne]3s23p1
C)   [Ar]4s14p1
D)   [Kr]5s24d7
E)   [He]1p1F) B) and E)
G) A) and B)

Question 12

Select the correct set of quantum numbers (n, l, ml, ms)  for the highest energy electron in the ground state of potassium, K.

Accepted Answer

A)   4, 1, -1, ½
B)   4, 1, 0, ½
C)   4, 0, 1, ½
D)   4, 0, 0, ½
E)   4, 1, 1, ½F) A) and D)
G) A) and E)

Question 13

Select the correct electron configuration for Te (Z = 52) .

Accepted Answer

A)   [Kr]5s25p64d8
B)   [Kr]5s25d105p4
C)   [Kr]5s24d105p6
D)   [Kr]5s24f14
E)   [Kr]5s24d105p4F) A) and E)
G) B) and E)

Question 14

Energy states of atoms containing more than one electron arise from nucleus-electron and electron-electron interactions. Which of the following statements correctly describes these effects?

Accepted Answer

A)   Larger nuclear charge lowers energy, more electrons in an orbital lowers energy.
B)   Larger nuclear charge lowers energy, more electrons in an orbital increases energy.
C)   Smaller nuclear charge lowers energy, more electrons in an orbital lowers energy.
D)   Smaller nuclear charge lowers energy, more electrons in an orbital increases energy.
E)   None of these choices are correct.F) A) and E)
G) B) and D)

Question 15

First ionization energies of neutral atoms may be positive or negative.

Accepted Answer

A) True 
 B)False

Question 16

Elements with the highest first ionization energies are found in the ___________ region of the periodic table.

Accepted Answer

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

Question 17

In a single atom, what is the maximum number of electrons which can have quantum number n = 4?

Accepted Answer

A)   16
B)   18
C)   32
D)   36
E)   None of these choices are correct.F) C) and D)
G) A) and E)

Question 18

Which one of the following equations correctly represents the process relating to the ionization energy of X?

Accepted Answer

A)   X(s)  → X+(g)  + e-
B)   X2(g)  → X+(g)  + X-(g) 
C)   X(g)  + e- → X-(g) 
D)   X-(g)  → X(g)  + e-
E)   X(g)  → X+(g)  + e-F) C) and D)
G) A) and B)

Question 19

Which of the following elements has the smallest atomic size?

Accepted Answer

A)   Na
B)   Ar
C)   K
D)   Ca
E)   KrF) B) and C)
G) C) and E)

Question 20

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

Accepted Answer

A)   P3- > Cl- > K+ > Ca2+
B)   Ca2+ > K+ > Cl- > P3-
C)   K+ > Cl- > Ca2+ > P3-
D)   K+ > Cl- > P3- > Ca2+
E)   None of these choices are correct.F) B) and C)
G) All of the above

Exam 8: Electron Configuration and Chemical Periodicity

Which of the following electron configurations is not possible for an atom in an excited state?

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

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Which one of the following equations correctly represents the process relating to the ionization energy of X?

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

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Which of the following electron configurations is correct for the excited state of an element?

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Energy states of atoms containing more than one electron arise from nucleus-electron and electron-electron interactions. Which of the following statements correctly describes these effects?

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The most basic oxides are formed from elements found in the __________________ region of the periodic table.

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Which of the following atoms will be diamagnetic?

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Select the correct set of quantum numbers (n, l, ml, ms) for the highest energy electron in the ground state of potassium, K.

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Elements with the highest first ionization energies are found in the ___________ region of the periodic table.

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Select the correct set of quantum numbers (n, l, ml, ms) for the highest energy electron in the ground state of tin, Sn.

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How many valence electrons are there in an atom with the electron configuration [noble gas]ns2(n - 1) d8?

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

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Select the correct electron configuration for Cu (Z = 29) .

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

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Select the correct electron configuration for Te (Z = 52) .

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The electronic structure 1s22s22p63s23p64s23d8 refers to the ground state of

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Which of the following elements has the smallest atomic size?

Correct AnswerverifiedShow Answer

In a single atom, what is the maximum number of electrons which can have quantum number n = 4?

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First ionization energies of neutral atoms may be positive or negative.

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Select the correct set of quantum numbers (n, l, m_l, m_s) for the highest energy electron in the ground state of potassium, K.

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Select the correct set of quantum numbers (n, l, m_l, m_s) for the highest energy electron in the ground state of tin, Sn.

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How many valence electrons are there in an atom with the electron configuration [noble gas]ns²(n - 1) d⁸?

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

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The electronic structure 1s²2s²2p⁶3s²3p⁶4s²3d⁸ refers to the ground state of

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