Question 1

Rank the following ions in order of decreasing ionic radii: Al3+,Mg2+,Al3+,Al3+.

Accepted Answer

A)  Al3+ > Al3+ > Mg2+ > Al3+ 
B)  Al3+ > Al3+ > Mg2+ > Al3+.. 
C)  Al3+> Mg2+ > Al3+ > Al3+ 
D)  Al3+ > Mg2+ > Al3+ > Al3+ 
E)  Mg2+ > Al3+ > Al3+ > Al3+ 
A)  Al3+ > Al3+ > Mg2+ > Al3+ 
B)  Al3+ > Al3+ > Mg2+ > Al3+.. 
C)  Al3+> Mg2+ > Al3+ > Al3+ 
D)  Al3+ > Mg2+ > Al3+ > Al3+ 
E)  Mg2+ > Al3+ > Al3+ > Al3+

Question 2

As one moves horizontally from left to right across a period,the effective ________ charge increases,resulting in decreasing atomic radii.

Accepted Answer

The answer of As one moves horizontally from left to...

Question 3

What is the charge formed by alkaline earth metals when they react with nonmetals?

Accepted Answer

A)  +1 
B)  −1 
C)  +2 
D)  −2 
E)  +3 
A)  +1 
B)  −1 
C)  +2 
D)  −2 
E)  +3

Question 4

What is the ground-state electron configuration of sulfur (S)?

Accepted Answer

A)  [Ne]3s33p3 
B)  [Ar]3s23p4 
C)  [Ar]3p6 
D)  [Ne]3s23p4 
E)  [Ar]3p6.. 
A)  [Ne]3s33p3 
B)  [Ar]3s23p4 
C)  [Ar]3p6 
D)  [Ne]3s23p4 
E)  [Ar]3p6..

Question 5

Which of the following atoms is diamagnetic in its ground state?

Accepted Answer

A)  mercury (Hg) 
B)  tin (Sn) 
C)  rhenium (Re) 
D)  berkelium (Bk) 
E)  phosphorus (P) 
A)  mercury (Hg) 
B)  tin (Sn) 
C)  rhenium (Re) 
D)  berkelium (Bk) 
E)  phosphorus (P)

Question 6

Arrange F,Cl,and Br in order of their increasing first ionization energies.

Accepted Answer

A)  F < Cl < Br 
B)  Cl < F < Br 
C)  Cl < Br < F 
D)  Br < F < Cl 
E)  Br < Cl < F 
A)  F < Cl < Br 
B)  Cl < F < Br 
C)  Cl < Br < F 
D)  Br < F < Cl 
E)  Br < Cl < F

Question 7

Which of the following elements is found in the d-block of the periodic table?

Accepted Answer

A)  Ir 
B)  Tb 
C)  Li 
D)  Cl 
E)  None of these 
A)  Ir 
B)  Tb 
C)  Li 
D)  Cl 
E)  None of these

Question 8

What is the ground-state electron configuration of the chloride ion?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 9

An atom of which of the following elements has the smallest atomic radius?

Accepted Answer

A)  F 
B)  Rb 
C)  Ca 
D)  Ge 
E)  P 
A)  F 
B)  Rb 
C)  Ca 
D)  Ge 
E)  P

Question 10

Which of the following atoms of elements has the largest atomic radius?

Accepted Answer

A)  Ga 
B)  In 
C)  Al 
D)  Tl 
E)  B 
A)  Ga 
B)  In 
C)  Al 
D)  Tl 
E)  B

Question 11

How many electrons can be described by the following quantum numbers: n = 3,   = 2,   = 1?

Accepted Answer

A)  1 
B)  2 
C)  6 
D)  10 
E)  18 
A)  1 
B)  2 
C)  6 
D)  10 
E)  18

Question 12

Which of the following cations has the same number of unpaired electrons as Fe2+?

Accepted Answer

A)  Ni2+ 
B)  Fe3+ 
C)  Cr2+ 
D)  Mn2+ 
E)  Co2+ 
A)  Ni2+ 
B)  Fe3+ 
C)  Cr2+ 
D)  Mn2+ 
E)  Co2+

Question 13

Which of the following electron configurations is not allowed?

Accepted Answer

A)  1s22s22p2 
B)  1s22s22p4 
C)  1s22s3 
D)  1s22s22p63s2 
E)  1s22s22p5 
A)  1s22s22p2 
B)  1s22s22p4 
C)  1s22s3 
D)  1s22s22p63s2 
E)  1s22s22p5

Question 14

An element that has the same ground state valence-shell electron configuration as thallium is

Accepted Answer

A)  gallium. 
B)  carbon. 
C)  krypton. 
D)  cesium. 
E)  magnesium. 
A)  gallium. 
B)  carbon. 
C)  krypton. 
D)  cesium. 
E)  magnesium.

Question 15

Which element has the following ground state electron configuration? 3d 4s
[Ar]

Accepted Answer

A)  Sc 
B)  Ni 
C)  Co 
D)  Fe 
E)  V 
A)  Sc 
B)  Ni 
C)  Co 
D)  Fe 
E)  V

Question 16

What noble gas core precedes the valence shell ground state electron configuration for potassium (K)?

Accepted Answer

A)  [Ar] 
B)  [Rn] 
C)  [Kr] 
D)  [Ne] 
E)  [Xe] 
A)  [Ar] 
B)  [Rn] 
C)  [Kr] 
D)  [Ne] 
E)  [Xe]

Question 17

Which of the following has the same (total)number of electrons as Ar?

Accepted Answer

A)  Na+ 
B)  Ca2+ 
C)  Ga3+ 
D)  O2- 
E)  none 
A)  Na+ 
B)  Ca2+ 
C)  Ga3+ 
D)  O2- 
E)  none

Question 18

A metal halide forms when potassium reacts with elemental chlorine.What is the most likely formula of this metal halide?

Accepted Answer

A)  KCl 
B)  KCl2 
C)  K2Cl 
D)  KCl3 
E)  K3Cl2 
A)  KCl 
B)  KCl2 
C)  K2Cl 
D)  KCl3 
E)  K3Cl2

Question 19

The procedure by which electrons are assigned to (or built up into)orbitals is known as the ____ principle.

Accepted Answer

A)  Aufbau 
B)  Bohr 
C)  Planck 
D)  Hund 
E)  Pauli 
A)  Aufbau 
B)  Bohr 
C)  Planck 
D)  Hund 
E)  Pauli

Question 20

According to the general trend in electron affinities,which group (or family)of elements tends to form the most stable anions in the gas phase?

Accepted Answer

A)  Noble gases 
B)  Halogens 
C)  Transition metals 
D)  Alkaline earth metals 
E)  Alkali metals 
A)  Noble gases 
B)  Halogens 
C)  Transition metals 
D)  Alkaline earth metals 
E)  Alkali metals

Exam 8: The Structure of Atoms and Periodic Trends

Rank the following ions in order of decreasing ionic radii: Al3+,Mg2+,Al3+,Al3+.

As one moves horizontally from left to right across a period,the effective ________ charge increases,resulting in decreasing atomic radii.

What is the charge formed by alkaline earth metals when they react with nonmetals?

What is the ground-state electron configuration of sulfur (S)?

Which of the following atoms is diamagnetic in its ground state?

Arrange F,Cl,and Br in order of their increasing first ionization energies.

Which of the following elements is found in the d-block of the periodic table?

What is the ground-state electron configuration of the chloride ion?

An atom of which of the following elements has the smallest atomic radius?

Which of the following atoms of elements has the largest atomic radius?

How many electrons can be described by the following quantum numbers: n = 3, = 2, = 1?

Which of the following cations has the same number of unpaired electrons as Fe2+?

Which of the following electron configurations is not allowed?

An element that has the same ground state valence-shell electron configuration as thallium is

Which element has the following ground state electron configuration? 3d 4s [Ar]

What noble gas core precedes the valence shell ground state electron configuration for potassium (K)?

Which of the following has the same (total)number of electrons as Ar?

A metal halide forms when potassium reacts with elemental chlorine.What is the most likely formula of this metal halide?

The procedure by which electrons are assigned to (or built up into)orbitals is known as the ____ principle.

According to the general trend in electron affinities,which group (or family)of elements tends to form the most stable anions in the gas phase?

Basic Concepts of Chemistry

Lets Review: The Tools of Quantitative Chemistry

Atoms, molecules, and Ions

Chemical Reactions

Stoichiometry: Quantitative Information About Chemical Reactions

Principles of Chemical Reactivity: Energy and Chemical Reactions

The Structure of Atoms

Bonding and Molecular Structure

Bonding and Molecular Structure Orbital Hybridization and Molecular Orbitals

Gases and Their Properties

Intermolecular Forces and Liquids

The Solid State

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Chemical Reactivity: Equilibria

Principles of Chemical Reactivity: the Chemistry of Acids and Bases

Principles of Chemical Reactivity: Other Aspects of Aqueous Equilibria

Principles of Chemical Reactivity: Entropy and Free Energy

Principles of Chemical Reactivity: Electron Transfer Reactions

Environmental Chemistry: Earths Environment, energy, and Sustainability

The Chemistry of the Main Group Elements

The Chemistry of the Transition Elements

Carbon: Not Just Another Element

Biochemistry

Nuclear Chemistry

Filters

Which of the following cations has the same number of unpaired electrons as Fe²⁺?