Question 1

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

Accepted Answer

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

Question 2

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

Question 3

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) A) and B)

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

The maximum number of electrons in an atom with the same value of n is 2n2.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following elements has the greatest atomic radius?

Accepted Answer

A)   Li
B)   Ne
C)   Rb
D)   Sr
E)   XeF) A) and B)
G) None of the above

Question 7

Hund's rule is used to predict the electron configuration of atoms in excited states.

Accepted Answer

A) True 
 B)False

Question 8

Consider the set of isoelectronic atoms and ions A2¯, B¯, C, D+, and E2+. Which arrangement of relative radii is correct?

Accepted Answer

A)   A2¯ > B¯ > C > D+ > E2+
B)   E2+ > D+ > C > B¯ > A2¯
C)   A2¯ > B¯ > C + 2+
D)   A2¯ ¯  D+ > E2+
E)   None of these choices is correct.F) B) and D)
G) B) and C)

Question 9

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 is generally correct.F) D) and E)
G) B) and D)

Question 10

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 D)
G) A) and E)

Question 11

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

Accepted Answer

A)   In a given atom, 18 is the maximum number of electrons having principal quantum number n = 3.
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) None of the above
G) A) and E)

Question 12

d10np3?

Accepted Answer

A)   2
B)   3
C)   5
D)   10
E)   15F) A) and D)
G) B) and C)

Question 13

Select the correct electron configuration for sulfur (Z = 16) .

Accepted Answer

A)   1s21p62s22p6
B)   1s22s22p83s23p4
C)   1s22s22p83s23p2
D)   1s22s22p63s23p4
E)   1s22s22p63s23d4F) A) and B)
G) A) and C)

Question 14

d8?

Accepted Answer

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

Question 15

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

Accepted Answer

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

Question 16

Identify the element of Period 2 which has the following successive ionization energies, in kJ/mol.

Accepted Answer

A)   Li
B)   B
C)   O
D)   Ne
E)   None of these choices is correct.F) C) and D)
G) A) and B)

Question 17

Define what is meant by electron affinity, and write a balanced chemical equation to represent the relevant process for element Y.

Accepted Answer

Electron affinity is the energ...

Question 18

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 E)
G) C) and E)

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

Elements in the same period of the periodic table have similar valence shell electron configurations.

Accepted Answer

A) True 
 B)False

Exam 8: Electron Configuration and Chemical Periodicity

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

Correct AnswerverifiedShow Answer

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

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The maximum number of electrons in an atom with the same value of n is 2n2.

Correct AnswerverifiedShow Answer

Select the correct electron configuration for sulfur (Z = 16) .

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following elements has the greatest atomic radius?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Define what is meant by electron affinity, and write a balanced chemical equation to represent the relevant process for element Y.

Correct AnswerverifiedElectron affinity is the energ...View AnswerShow Answer

Hund's rule is used to predict the electron configuration of atoms in excited states.

Correct AnswerverifiedShow Answer

Identify the element of Period 2 which has the following successive ionization energies, in kJ/mol.

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

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Elements in the same period of the periodic table have similar valence shell electron configurations.

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Consider the set of isoelectronic atoms and ions A2¯, B¯, C, D+, and E2+. Which arrangement of relative radii is correct?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following elements has the smallest atomic size?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

d10np3?

Correct AnswerverifiedShow Answer

d8?

Correct AnswerverifiedShow Answer

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The maximum number of electrons in an atom with the same value of n is 2n².

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

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

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Electron affinity is the energ...
View Answer

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

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Consider the set of isoelectronic atoms and ions A^2¯, B^¯, C, D⁺, and E²⁺. Which arrangement of relative radii is correct?

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d¹⁰np³?

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d⁸?

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