Question 1

Which of these species make an isoelectronic pair: Cl-, O2-, F, Ca2+, Fe3+?

Accepted Answer

A)  Ca2+ and Fe3+ 
B)  O2- and F 
C)  F and Cl-  
D)  Cl- and Ca2+ 
E)  None of the species are part of an isoelectronic series. 
A)  Ca2+ and Fe3+ 
B)  O2- and F 
C)  F and Cl-  
D)  Cl- and Ca2+ 
E)  None of the species are part of an isoelectronic series.

Question 2

Which of the following elements has the largest atomic size?

Accepted Answer

A)  S 
B)  Ca 
C)  Ba 
D)  Po 
E)  Rn 
A)  S 
B)  Ca 
C)  Ba 
D)  Po 
E)  Rn

Question 3

Which of these ground-state ions has unpaired electrons?

Accepted Answer

A)  P3- 
B)  V5+ 
C)  Mg2+ 
D)  Sc2+ 
E)  S2- 
A)  P3- 
B)  V5+ 
C)  Mg2+ 
D)  Sc2+ 
E)  S2-

Question 4

The effective nuclear charge for an atom is less than the actual nuclear charge due to

Accepted Answer

A)  shielding. 
B)  penetration. 
C)  paramagnetism. 
D)  electron-pair repulsion. 
E)  relativity. 
A)  shielding. 
B)  penetration. 
C)  paramagnetism. 
D)  electron-pair repulsion. 
E)  relativity.

Question 5

Which one of these elements is a transition element?

Accepted Answer

A)  Nickel 
B)  Tin 
C)  Sodium 
D)  Sulfur 
E)  Calcium 
A)  Nickel 
B)  Tin 
C)  Sodium 
D)  Sulfur 
E)  Calcium

Question 6

Anions of Group 7A elements are isoelectronic with what group?

Accepted Answer

Noble gase

Question 7

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 8

Which of these atoms has the smallest radius?

Accepted Answer

A)  Al 
B)  P 
C)  As 
D)  Te 
E)  Na 
A)  Al 
B)  P 
C)  As 
D)  Te 
E)  Na

Question 9

Each of the noble gases has a completely filled p subshell except for which one?

Accepted Answer

A)  Xenon 
B)  Neon 
C)  Radon 
D)  Argon 
E)  Helium 
A)  Xenon 
B)  Neon 
C)  Radon 
D)  Argon 
E)  Helium

Question 10

How many valence electrons does a tin (Sn) atom have?

Accepted Answer

A)  2 
B)  4 
C)  14 
D)  36 
E)  50 
A)  2 
B)  4 
C)  14 
D)  36 
E)  50

Question 11

Which one of the following equations correctly represents the process involved in the electron affinity of X?

Accepted Answer

A)  X(g) → X+(g) + e- 
B)  X+(g) → X+(aq) 
C)  X+(g) + e- → X(g) 
D)  X(g) + e- → X-(g) 
E)  X+(g) + Y-(g) → XY(s) 
A)  X(g) → X+(g) + e- 
B)  X+(g) → X+(aq) 
C)  X+(g) + e- → X(g) 
D)  X(g) + e- → X-(g) 
E)  X+(g) + Y-(g) → XY(s)

Question 12

Which ion is isoelectronic with Ar?

Accepted Answer

A)  Fe2+ 
B)  F- 
C)  Br- 
D)  Ga3+ 
E)  Ca2+ 
A)  Fe2+ 
B)  F- 
C)  Br- 
D)  Ga3+ 
E)  Ca2+

Question 13

The general electron configuration for atoms of the halogen group is

Accepted Answer

A)  ns2np6. 
B)  ns2np5. 
C)  ns2np6 (n - 1)d7. 
D)  ns1. 
E)  ns2np7. 
A)  ns2np6. 
B)  ns2np5. 
C)  ns2np6 (n - 1)d7. 
D)  ns1. 
E)  ns2np7.

Question 14

In what group of the periodic table is the element with the electron configuration [Ar]4s23d104p3?

Accepted Answer

A)  1A 
B)  2A 
C)  3A 
D)  4A 
E)  5A 
A)  1A 
B)  2A 
C)  3A 
D)  4A 
E)  5A

Question 15

Who found that the atomic number was equal to the number of protons in the nucleus and to the number of electrons outside the nucleus in a neutral atom?

Accepted Answer

A)  Meyer 
B)  Newlands 
C)  Moseley 
D)  Mendeleev 
E)  Thomson 
A)  Meyer 
B)  Newlands 
C)  Moseley 
D)  Mendeleev 
E)  Thomson

Question 16

An element with the electron configuration [noble gas]ns2(n - 1)d8 has ________ valence electrons.

Accepted Answer

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

Question 17

The general electron configuration for atoms of all elements in Group 5A is

Accepted Answer

A)  ns2np6. 
B)  ns2np5. 
C)  ns2np4. 
D)  ns2np3. 
E)  ns2np1. 
A)  ns2np6. 
B)  ns2np5. 
C)  ns2np4. 
D)  ns2np3. 
E)  ns2np1.

Question 18

Which of these elements has the smallest first ionization energy?

Accepted Answer

A)  Cl 
B)  Na 
C)  Be 
D)  K 
E)  As 
A)  Cl 
B)  Na 
C)  Be 
D)  K 
E)  As

Question 19

The electron affinity of oxygen is equal to

Accepted Answer

A)  the ionization energy of O-. 
B)  the ionization energy of O2-. 
C)  the second ionization energy of O. 
D)  twice the electron affinity of O+. 
E)  none of these. 
A)  the ionization energy of O-. 
B)  the ionization energy of O2-. 
C)  the second ionization energy of O. 
D)  twice the electron affinity of O+. 
E)  none of these.

Question 20

Which of these elements has the greatest metallic character?

Accepted Answer

A)  Br 
B)  F 
C)  Ge 
D)  Mn 
E)  Sc 
A)  Br 
B)  F 
C)  Ge 
D)  Mn 
E)  Sc

Exam 7: Electron Configuration and the Periodic Table

Which of these species make an isoelectronic pair: Cl-, O2-, F, Ca2+, Fe3+?

Which of the following elements has the largest atomic size?

Which of these ground-state ions has unpaired electrons?

The effective nuclear charge for an atom is less than the actual nuclear charge due to

Which one of these elements is a transition element?

Anions of Group 7A elements are isoelectronic with what group?

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

Which of these atoms has the smallest radius?

Each of the noble gases has a completely filled p subshell except for which one?

How many valence electrons does a tin (Sn) atom have?

Which one of the following equations correctly represents the process involved in the electron affinity of X?

Which ion is isoelectronic with Ar?

The general electron configuration for atoms of the halogen group is

In what group of the periodic table is the element with the electron configuration [Ar]4s23d104p3?

Who found that the atomic number was equal to the number of protons in the nucleus and to the number of electrons outside the nucleus in a neutral atom?

An element with the electron configuration [noble gas]ns2(n - 1)d8 has ________ valence electrons.

The general electron configuration for atoms of all elements in Group 5A is

Which of these elements has the smallest first ionization energy?

The electron affinity of oxygen is equal to

Which of these elements has the greatest metallic character?

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

Which of these species make an isoelectronic pair: Cl^-, O^2-, F, Ca²⁺, Fe³⁺?

In what group of the periodic table is the element with the electron configuration [Ar]4s²3d¹⁰4p³?

An element with the electron configuration [noble gas]ns²(n - 1)d⁸ has ________ valence electrons.