Question 1

Which one of the following statements about atomic structure and quantum numbers is incorrect?

Accepted Answer

A)   In a given atom, the maximum number of electrons having principal quantum number n = 3, is 18.
B)   The number of orbitals in a given f subshell is 7.
C)   For n = 4, the largest possible value of l is 3.
D)   For n = 4, the largest possible value of ml is 2.
E)   The following set of quantum numbers for a single orbital is not allowed: n = 3, l = 1, ml = -2.F) A) and D)
G) B) and C)

Question 2

Elements in which the outermost electron has the same principal quantum number n, show similar chemical properties.

Accepted Answer

A) True 
 B)False

Question 3

Define what is meant by ionization energy, and write a balanced chemical equation to represent the relevant process for element X.

Accepted Answer

Ionization energy is the minim...

Question 4

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

Accepted Answer

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

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

Identify the element of Period 2 which has the following successive ionization energies, in kJ/mol. IE1, 1314 IE2, 3389 IE3, 5298 IE4, 7471
IE5, 10992 IE6, 13329 IE7, 71345 IE8, 84087

Accepted Answer

A)   Li
B)   B
C)   O
D)   Ne
E)   none of the aboveF) A) and D)
G) None of the above

Question 7

Describe how the atomic radii of main group elements vary with position in the periodic table.

Accepted Answer

Among the main group elements,...

Question 8

Which of the following elements has the greatest atomic radius?

Accepted Answer

A)   Li
B)   Ne
C)   Rb
D)   Sr
E)   XeF) B) and E)
G) A) and B)

Question 9

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

Accepted Answer

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

Question 10

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 the aboveF) B) and C)
G) A) and C)

Question 11

Bigger atoms generally have smaller ionization energies.

Accepted Answer

A) True 
 B)False

Question 12

Describe how the ionization energies of main group elements vary across a period in the periodic table, using a diagram if necessary.

Accepted Answer

Ionization energies generally ...

Question 13

The difference in energies between the 1s and 2s orbitals is due to the penetration effect.

Accepted Answer

A) True 
 B)False

Question 14

In many-electron atoms, which quantum numbers specify the energy of an electron?

Accepted Answer

A)   n and l
B)   n and ml
C)   l and ml
D)   n and ms
E)   n, l, and mlF) A) and E)
G) B) and C)

Question 15

"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) A) and E)

Question 16

Briefly describe how the atomic radii and ionization energies of group 1A(1) elements compare with those of group 8A(18). Also, explain why the values of these properties are so different between these two groups.

Accepted Answer

Group 1A (1) atoms are much la...

Question 17

A negative electron affinity implies that the atom repels an approaching electron.

Accepted Answer

A) True 
 B)False

Question 18

Electron affinities of neutral atoms may be positive or negative.

Accepted Answer

A) True 
 B)False

Question 19

When comparing the successive ionization energies of an element, an unusually big increase in ionization energy is seen when

Accepted Answer

A)   the first valence electron is removed.
B)   the second valence electron is removed.
C)   the eighth electron of is removed.
D)   the first core electron is removed.
E)   the last valence electron is removed.F) A) and B)
G) C) and D)

Question 20

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) B) and E)
G) All of the above

Exam 8: Electron Configuration and Chemical Periodicity

Electron affinities of neutral atoms may be positive or negative.

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

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Describe how the ionization energies of main group elements vary across a period in the periodic table, using a diagram if necessary.

Correct AnswerverifiedIonization energies generally ...View AnswerShow Answer

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

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

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A negative electron affinity implies that the atom repels an approaching electron.

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Which of the following elements has the greatest atomic radius?

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

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Describe how the atomic radii of main group elements vary with position in the periodic table.

Correct AnswerverifiedAmong the main group elements,...View AnswerShow Answer

Which one of the following statements about atomic structure and quantum numbers is incorrect?

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Briefly describe how the atomic radii and ionization energies of group 1A(1) elements compare with those of group 8A(18). Also, explain why the values of these properties are so different between these two groups.

Correct AnswerverifiedGroup 1A (1) atoms are much la...View AnswerShow Answer

Bigger atoms generally have smaller ionization energies.

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The difference in energies between the 1s and 2s orbitals is due to the penetration effect.

Correct AnswerverifiedShow Answer

When comparing the successive ionization energies of an element, an unusually big increase in ionization energy is seen when

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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Identify the element of Period 2 which has the following successive ionization energies, in kJ/mol. IE1, 1314 IE2, 3389 IE3, 5298 IE4, 7471 IE5, 10992 IE6, 13329 IE7, 71345 IE8, 84087

Correct AnswerverifiedShow Answer

Elements in which the outermost electron has the same principal quantum number n, show similar chemical properties.

Correct AnswerverifiedShow Answer

In many-electron atoms, which quantum numbers specify the energy of an electron?

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Define what is meant by ionization energy, and write a balanced chemical equation to represent the relevant process for element X.

Correct AnswerverifiedIonization energy is the minim...View AnswerShow Answer

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

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Ionization energies generally ...
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Which of the following elements has the largest second ionization energy (IE₂) ?

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Among the main group elements,...
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Group 1A (1) atoms are much la...
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Identify the element of Period 2 which has the following successive ionization energies, in kJ/mol. IE₁, 1314 IE₂, 3389 IE₃, 5298 IE₄, 7471 IE₅, 10992 IE₆, 13329 IE₇, 71345 IE₈, 84087

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Ionization energy is the minim...
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