Question 1

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 3 
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 3

Question 2

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 right 
A) lower left 
B) upper left 
C) center 
D) lower right 
E) upper right

Question 3

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) Ne 
A) H 
B) Li 
C) C 
D) F 
E) Ne

Question 4

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 5

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

Accepted Answer

A) True 
 B)False

Question 6

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

Question 7

Select the diamagnetic ion.

Accepted Answer

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

Question 8

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 9 
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 9

Question 9

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, ½ 
A) 5, 2, −1, ½ 
B) 5, 2, 0, ½ 
C) 5, 1, 2, ½ 
D) 5, 1, 0, ½ 
E) 5, 2, 1, ½

Question 10

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

Accepted Answer

A) Si 
B) Sr 
C) Ga 
D) Cs 
E) S 
A) Si 
B) Sr 
C) Ga 
D) Cs 
E) S

Question 11

Which of the following elements has the smallest atomic radius?

Accepted Answer

A) Li 
B) Ne 
C) Rb 
D) Sr 
E) Xe 
A) Li 
B) Ne 
C) Rb 
D) Sr 
E) Xe

Question 12

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. 
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.

Question 13

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. 
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.

Question 14

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

Question 15

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 − 
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 −

Question 16

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, ½ 
A) 4, 1, −1, ½ 
B) 4, 1, 0, ½ 
C) 4, 0, 1, ½ 
D) 4, 0, 0, ½ 
E) 4, 1, 1, ½

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

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

Question 19

Select the element with the greatest metallic character.

Accepted Answer

A) Li 
B) Ca 
C) Al 
D) Pb 
E) Cs 
A) Li 
B) Ca 
C) Al 
D) Pb 
E) Cs

Question 20

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. 
A) Li 
B) B 
C) O 
D) Ne 
E) None of these choices are correct.

Exam 8: Electron Configuration and Chemical Periodicity

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

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

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

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

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

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

Select the diamagnetic ion.

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

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

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

Which of the following elements has the smallest atomic radius?

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

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

"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

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

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

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

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

Select the element with the greatest metallic character.

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

Keys to the Study of Chemistry: Definitions, Units, and Problem Solving

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and Reaction Direction

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

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.

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

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.

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

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

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