Question 1

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

Accepted Answer

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

Question 2

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 B)
G) C) and E)

Question 3

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)  X 2( 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) D) and E)

Question 4

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) C) and D)

Question 5

Which of the following elements has the smallest atomic radius?

Accepted Answer

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

Question 6

In forming ions of the first series of transition metals, the 4s electrons are lost before the 3d electrons.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following elements will form a cation with a +2 charge?

Accepted Answer

A)  Si
B)  Sr
C)  Ga
D)  Cs
E)  SF) B) and D)
G) C) and E)

Question 8

Select the element with the greatest metallic character.

Accepted Answer

A)  Li
B)  Ca
C)  Al
D)  Pb
E)  CsF) B) and D)
G) B) and E)

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

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) B) and D)
G) B) and E)

Question 11

Which of the following electron configurations represents the ground state of an element?

Accepted Answer

A)  [Ne]3 s 13 p 1
B)  [He]2 s 12 p 3
C)  [Ne]3 s 23 p 23 d 1
D)  [Ne]3 s 23 p 33 d 1
E)  [Ne]3 s 23 p 3F) A) and B)
G) B) and D)

Question 12

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

Question 13

Select the element with the most negative electron affinity (i.e., accepts an electron most readily) .

Accepted Answer

A)  H
B)  Li
C)  C
D)  F
E)  NeF) C) and D)
G) A) and C)

Question 14

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) B) and D)
G) B) and C)

Question 15

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 these choices are correct.F) A) and B)
G) B) and C)

Question 16

Select the diamagnetic ion.

Accepted Answer

A)  Cu 2+
B)  Ni 2+
C)  Cr 3+
D)  Sc 3+
E)  Cr 2+F) B) and D)
G) A) and E)

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

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

Accepted Answer

A)  [Ar]4 s 23 d 9
B)  [Ar]4 s 13 d 10
C)  [Ar]4 s 24 p 63 d 3
D)  [Ar]4 s 24 d 9
E)  [Ar]5 s 24 d 9F) C) and D)
G) B) and D)

Question 19

Which of the following sublevels is filled last? 3d, 4s, 4p, 4d, 5s

Accepted Answer

A)  3 d
B)  4 s
C)  4 p
D)  4 d
E)  5 sF) B) and E)
G) A) and B)

Question 20

"Electrons added to atomic orbitals of the same energy will remain unpaired with parallel spins until the subshell is more than half-filled" is a statement of

Accepted Answer

A)  the aufbau principle.
B)  Hund's rule.
C)  the Pauli exclusion principle.
D)  the periodic law.
E)  the singularity rule.F) D) and E)
G) C) and E)

Exam 8: Electron Configuration and Chemical Periodicity

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

Correct AnswerverifiedShow Answer

Select the element with the greatest metallic character.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Select the diamagnetic ion.

Correct AnswerverifiedShow Answer

In forming ions of the first series of transition metals, the 4s electrons are lost before the 3d electrons.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following elements will form a cation with a +2 charge?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following electron configurations represents the ground state of an element?

Correct AnswerverifiedShow Answer

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

Select the element with the most negative electron affinity (i.e., accepts an electron most readily) .

Correct AnswerverifiedShow Answer

Which of the following sublevels is filled last? 3d, 4s, 4p, 4d, 5s

Correct AnswerverifiedShow Answer

Which of the following elements has the smallest atomic radius?

Correct AnswerverifiedShow Answer

"Electrons added to atomic orbitals of the same energy will remain unpaired with parallel spins until the subshell is more than half-filled" is a statement of

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

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.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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 Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified