Question 1

Which one of the following oxides does not react with water to form acid solutions?

Accepted Answer

A) CO 2 
B) SO 3 
C) BaO 
D) NO 2 
E) Cl 2O 7 
A) CO 2 
B) SO 3 
C) BaO 
D) NO 2 
E) Cl 2O 7

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

Electron affinities of neutral atoms may be positive or negative.

Accepted Answer

A) True 
 B)False

Question 4

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 are correct. 
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 are correct.

Question 5

Which of the following ions will be most likely to form when selenium ionizes?

Accepted Answer

A) Se 6+ 
B) Se 4+ 
C) Se 2+ 
D) Se 2− 
E) Se 4− 
A) Se 6+ 
B) Se 4+ 
C) Se 2+ 
D) Se 2− 
E) Se 4−

Question 6

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

Accepted Answer

A) P 3− > Cl − > K + > Ca 2+ 
B) Ca 2+ > K + > Cl − > P 3− 
C) K + > Cl − > Ca 2+ > P 3− 
D) K + > Cl − > P 3− > Ca 2+ 
E) None of these choices are correct. 
A) P 3− > Cl − > K + > Ca 2+ 
B) Ca 2+ > K + > Cl − > P 3− 
C) K + > Cl − > Ca 2+ > P 3− 
D) K + > Cl − > P 3− > Ca 2+ 
E) None of these choices are correct.

Question 7

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

Accepted Answer

A) K 
B) Ti 
C) Cu 
D) Ge 
E) Kr 
A) K 
B) Ti 
C) Cu 
D) Ge 
E) Kr

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

Which of the following has the most negative electron affinity?

Accepted Answer

A) H 
B) Li 
C) Na 
D) K 
E) Rb 
A) H 
B) Li 
C) Na 
D) K 
E) Rb

Question 10

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

Accepted Answer

A) All of the electrons after the [Ar] 
B) Only the 4 s 2 electrons 
C) Only the 3 d 10 electrons 
D) Only the 4 p 4 electrons 
E) Both the 4 s 2 and the 4 p 4 electrons 
A) All of the electrons after the [Ar] 
B) Only the 4 s 2 electrons 
C) Only the 3 d 10 electrons 
D) Only the 4 p 4 electrons 
E) Both the 4 s 2 and the 4 p 4 electrons

Question 11

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

Question 12

Which of the following elements has the largest first ionization energy?

Accepted Answer

A) Na 
B) Cl 
C) Ca 
D) Te 
E) Br 
A) Na 
B) Cl 
C) Ca 
D) Te 
E) Br

Question 13

Elements with __________ first ionization energies and __________ electron affinities generally form anions.

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 are correct. 
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 are correct.

Question 14

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

Accepted Answer

A) Li 
B) B 
C) O 
D) F 
E) Na 
A) Li 
B) B 
C) O 
D) F 
E) Na

Question 15

Consider the element with the electron configuration: [Rn]7s25f7. How would you classify this element?

Accepted Answer

A) A representative element 
B) A transition metal 
C) A nonmetal 
D) An actinide element 
E) A noble gas 
A) A representative element 
B) A transition metal 
C) A nonmetal 
D) An actinide element 
E) A noble gas

Question 16

The most acidic 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 left 
A) upper right 
B) upper left 
C) center 
D) lower right 
E) lower left

Question 17

According to the exclusion principle, two is the maximum number of electrons in an atom which can share the same four quantum numbers.

Accepted Answer

A) True 
 B)False

Exam 8: Electron Configuration and Chemical Periodicity

Which one of the following oxides does not react with water to form acid solutions?

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

Electron affinities of neutral atoms may be positive or negative.

Elements with __________ first ionization energies and__________ electron affinities generally form cations.

Which of the following ions will be most likely to form when selenium ionizes?

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

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

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

Which of the following has the most negative electron affinity?

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

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

Which of the following elements has the largest first ionization energy?

Elements with __________ first ionization energies and __________ electron affinities generally form anions.

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

Consider the element with the electron configuration: [Rn]7s25f7. How would you classify this element?

The most acidic oxides are formed from elements found in the __________ region of the periodic table.

According to the exclusion principle, two is the maximum number of electrons in an atom which can share the same four quantum numbers.

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

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

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

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

Elements with first ionization energies and electron affinities generally form anions.

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