Question 1

Explain why hydrogen is placed in Group 1A even though it really belongs in a group by itself.

Accepted Answer

Hydrogen is typically placed a

Question 2

Moseley's measurements of nuclear charges of the elements provided the basis for arranging the elements of the periodic table in order of increasing atomic number.

Accepted Answer

A) True 
 B)False

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

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

Accepted Answer

A)  low, very positive 
B)  high, positive or slightly negative 
C)  low, positive or slightly negative 
D)  high, very positive 
E)  None of these is generally correct. 
A)  low, very positive 
B)  high, positive or slightly negative 
C)  low, positive or slightly negative 
D)  high, very positive 
E)  None of these is generally correct.

Question 5

What two 19th century scientists created the modern periodic table?

Accepted Answer

Dmitri Men

Question 6

Successive ionization energies, 1st, 2nd, 3rd, etc., provide evidence for the shell structure of the atom. For sulfur atoms, which ionization energy will show an exceptionally large increase over the preceding ionization energy?

Accepted Answer

A)  2nd 
B)  3rd 
C)  4th 
D)  5th 
E)  6th 
A)  2nd 
B)  3rd 
C)  4th 
D)  5th 
E)  6th

Question 7

How many valence electrons does a carbon atom have?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  6 
A)  1 
B)  2 
C)  3 
D)  4 
E)  6

Question 8

Arrange P, S, and O in order of increasing atomic radius.

Accepted Answer

A)  S < O < P 
B)  P < S < O 
C)  O < S < P 
D)  O < P < S 
E)  The answer cannot be determined from the data given. 
A)  S < O < P 
B)  P < S < O 
C)  O < S < P 
D)  O < P < S 
E)  The answer cannot be determined from the data given.

Question 9

________ is the energy released when a single atom in the gas phase accepts an electron.

Accepted Answer

The answer of ________ is the energy released when a...

Question 10

Select the element with the least metallic character.

Accepted Answer

A)  Sn 
B)  Sr 
C)  Tl 
D)  Ge 
E)  Ga 
A)  Sn 
B)  Sr 
C)  Tl 
D)  Ge 
E)  Ga

Question 11

Which of the following elements has the largest third ionization energy (IE3)?

Accepted Answer

A)  Li 
B)  B 
C)  Ne 
D)  Be 
E)  Al 
A)  Li 
B)  B 
C)  Ne 
D)  Be 
E)  Al

Question 12

An aluminum ion, Al3+, has

Accepted Answer

A)  13 protons and 13 electrons. 
B)  27 protons and 24 electrons. 
C)  16 protons and 13 electrons. 
D)  13 protons and 10 electrons. 
E)  10 protons and 13 electrons. 
A)  13 protons and 13 electrons. 
B)  27 protons and 24 electrons. 
C)  16 protons and 13 electrons. 
D)  13 protons and 10 electrons. 
E)  10 protons and 13 electrons.

Question 13

An isoelectronic series is

Accepted Answer

A)  a series that has two or more species that have identical nuclear charges, but have different electron configurations. 
B)  a series that has the same ionization potentials. 
C)  a series that can have only up to three species and have similar electron configuration and similar nuclear charges. 
D)  a series that has two or more species that have identical electron configurations, but different nuclear charges. 
E)  a series that has the same nuclear charge. 
A)  a series that has two or more species that have identical nuclear charges, but have different electron configurations. 
B)  a series that has the same ionization potentials. 
C)  a series that can have only up to three species and have similar electron configuration and similar nuclear charges. 
D)  a series that has two or more species that have identical electron configurations, but different nuclear charges. 
E)  a series that has the same nuclear charge.

Question 14

Arrange these ions in order of increasing ionic radius: K+, P3-, S2-, Cl-.

Accepted Answer

A)  K+ - 2- 3- 
B)  K+ 3- 2- - 
C)  P3- 2- - +  
D)  Cl- 2- 3- + 
E)  Cl- 2- + 3- 
A)  K+ - 2- 3- 
B)  K+ 3- 2- - 
C)  P3- 2- - +  
D)  Cl- 2- 3- + 
E)  Cl- 2- + 3-

Question 15

Which pair of ions exhibits the greatest attractive force between them?

Accepted Answer

A)  Na+ and Cl- 
B)  Ca2+ and Cl- 
C)  Na+ and S2- 
D)  Al3+ and Mg2+ 
E)  Mg2+ and O2- 
A)  Na+ and Cl- 
B)  Ca2+ and Cl- 
C)  Na+ and S2- 
D)  Al3+ and Mg2+ 
E)  Mg2+ and O2-

Question 16

Which of these choices is the electron configuration for the chloride ion?

Accepted Answer

A)  [Ne]3s23p4 
B)  [Ne]3s23p7 
C)  [Ar] 
D)  [Ar]4s1 
E)  [Ne]3s23p5 
A)  [Ne]3s23p4 
B)  [Ne]3s23p7 
C)  [Ar] 
D)  [Ar]4s1 
E)  [Ne]3s23p5

Question 17

Which one of these ions is not isoelectronic with Kr?

Accepted Answer

A)  As3+ 
B)  Se2- 
C)  Rb+ 
D)  Sr2+ 
E)  Br- 
A)  As3+ 
B)  Se2- 
C)  Rb+ 
D)  Sr2+ 
E)  Br-

Question 18

Which of these pairs constitutes an isoelectronic pair?

Accepted Answer

A)  Mn2+ and Ar 
B)  Zn2+ and Cu2+ 
C)  Na+ and K+  
D)  Cl- and S 
E)  K+ and Cl- 
A)  Mn2+ and Ar 
B)  Zn2+ and Cu2+ 
C)  Na+ and K+  
D)  Cl- and S 
E)  K+ and Cl-

Question 19

The periodic table was first arranged according to increasing atomic masses.

Accepted Answer

A) True 
 B)False

Question 20

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 is generally 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 is generally correct.

Exam 7: Electron Configuration and the Periodic Table

Explain why hydrogen is placed in Group 1A even though it really belongs in a group by itself.

Moseley's measurements of nuclear charges of the elements provided the basis for arranging the elements of the periodic table in order of increasing atomic number.

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

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

What two 19th century scientists created the modern periodic table?

Successive ionization energies, 1st, 2nd, 3rd, etc., provide evidence for the shell structure of the atom. For sulfur atoms, which ionization energy will show an exceptionally large increase over the preceding ionization energy?

How many valence electrons does a carbon atom have?

Arrange P, S, and O in order of increasing atomic radius.

________ is the energy released when a single atom in the gas phase accepts an electron.

Select the element with the least metallic character.

Which of the following elements has the largest third ionization energy (IE3)?

An aluminum ion, Al3+, has

An isoelectronic series is

Arrange these ions in order of increasing ionic radius: K+, P3-, S2-, Cl-.

Which pair of ions exhibits the greatest attractive force between them?

Which of these choices is the electron configuration for the chloride ion?

Which one of these ions is not isoelectronic with Kr?

Which of these pairs constitutes an isoelectronic pair?

The periodic table was first arranged according to increasing atomic masses.

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

Chemistry: the Central Science

Atoms, Molecules, and Ions

Stoichiometry: Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Bonding Theories

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy, Free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

Filters

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

What two 19^th century scientists created the modern periodic table?

Which of the following elements has the largest third ionization energy (IE₃)?

An aluminum ion, Al³⁺, has

Arrange these ions in order of increasing ionic radius: K⁺, P^3-, S^2-, Cl^-.

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