Question 1

Which of the following ions have the same ground state electron configuration: S2-,N3-,Mg2+,and Br-?

Accepted Answer

A)  N3- and Mg2+ 
B)  S2-,N3-,and Br- 
C)  S2- and Br- 
D)  Mg2+ and Br- 
E)  S2-,N3-,Mg2+,and Br- 
A)  N3- and Mg2+ 
B)  S2-,N3-,and Br- 
C)  S2- and Br- 
D)  Mg2+ and Br- 
E)  S2-,N3-,Mg2+,and Br- A

Question 2

Electron ________ is defined as the energy change for a process in which a gas phase atom acquires an electron.

Accepted Answer

affinity

Question 3

The f-block elements are also referred to as the ________ and actinides.

Accepted Answer

lanthanides

Question 4

Which of the following electron configurations is not allowed?

Accepted Answer

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

Question 5

What is the ground state electron configuration for Cr3+?

Accepted Answer

A)  [Ar] 
B)  [Ar]3d74s2 
C)  [Ar]3d14s2 
D)  [Ar]3d24s1 
E)  [Ar]3d3 
A)  [Ar] 
B)  [Ar]3d74s2 
C)  [Ar]3d14s2 
D)  [Ar]3d24s1 
E)  [Ar]3d3

Question 6

Which of the following electron configurations corresponds to the ground state of an atom of a transition element?

Accepted Answer

A)  1s22s22p3 
B)  1s22s22p63s23p63d104s24p1 
C)  1s22s22p63s23p63d24s2 
D)  1s22s22p63s23p64s2 
E)  1s22s22p63s23p4 
A)  1s22s22p3 
B)  1s22s22p63s23p63d104s24p1 
C)  1s22s22p63s23p63d24s2 
D)  1s22s22p63s23p64s2 
E)  1s22s22p63s23p4

Question 7

Place the following ions in order from smallest to largest ionic radii: K+,Na+,Mg2+,and Al3+.

Accepted Answer

A)  Al3+ 2+ + + 
B)  Na+ 2+ 3+ + 
C)  K+ 2+ + 3+ 
D)  K+ 3+ 2+ + 
E)  Mg2+ 3+ + + 
A)  Al3+ 2+ + + 
B)  Na+ 2+ 3+ + 
C)  K+ 2+ + 3+ 
D)  K+ 3+ 2+ + 
E)  Mg2+ 3+ + +

Question 8

Explain why the first ionization energy for oxygen is lower than that for nitrogen.

Accepted Answer

Oxygen has a 1s²2s²2p⁴ electron configurati

Question 9

What 2+ ion has the following ground state electron configuration?

Accepted Answer

A)  Cd2+ 
B)  Sr2+ 
C)  Zn2+ 
D)  Sn2+ 
E)  None 
A)  Cd2+ 
B)  Sr2+ 
C)  Zn2+ 
D)  Sn2+ 
E)  None

Question 10

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

Accepted Answer

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

Question 11

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 12

A metal nitride forms when sodium reacts with elemental nitrogen.What is the most likely formula of this metal nitride?

Accepted Answer

A)  NaN 
B)  Na3N 
C)  Na2N3 
D)  Na3N2 
E)  NaN3 
A)  NaN 
B)  Na3N 
C)  Na2N3 
D)  Na3N2 
E)  NaN3

Question 13

Rank the following atoms in order decreasing atomic radii: C,N,B,Al.

Accepted Answer

A)  Al > B > C > N 
B)  B > Al > C > N 
C)  C > B > Al > N 
D)  B > C > N > Al 
E)  Al > C > B > N 
A)  Al > B > C > N 
B)  B > Al > C > N 
C)  C > B > Al > N 
D)  B > C > N > Al 
E)  Al > C > B > N

Question 14

A metal oxide forms when strontium reacts with oxygen.What is the most likely formula of this metal oxide?

Accepted Answer

A)  SrO 
B)  Sr2O 
C)  Sr2O3 
D)  SrO2 
E)  SrO3 
A)  SrO 
B)  Sr2O 
C)  Sr2O3 
D)  SrO2 
E)  SrO3

Question 15

How many electrons can be described by the following quantum numbers: n = 6,   = 4,   = -4?

Accepted Answer

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

Question 16

Which of the following elements would be expected to have chemical and physical properties most similar to those of the barium (Ba)?

Accepted Answer

A)  magnesium (Mg) 
B)  argon (Ar) 
C)  aluminum (Al) 
D)  tin (Sn) 
E)  potassium (K) 
A)  magnesium (Mg) 
B)  argon (Ar) 
C)  aluminum (Al) 
D)  tin (Sn) 
E)  potassium (K)

Question 17

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

Accepted Answer

A)    
B)    
C)    
D)    
E)  none 
A)    
B)    
C)    
D)    
E)  none

Question 18

________ rule states that the most stable arrangement of electrons is that which contains the maximum number of unpaired electrons,all with the same spin direction.

Accepted Answer

The answer of ________ rule states that the most stable...

Question 19

Which elements have no affinity for electrons?

Accepted Answer

A)  transition metals 
B)  s-block elements 
C)  main group nonmetals 
D)  noble gases 
E)  semiconductors 
A)  transition metals 
B)  s-block elements 
C)  main group nonmetals 
D)  noble gases 
E)  semiconductors

Question 20

In general,atomic radii

Accepted Answer

A)  decrease down a group and remain constant across a period. 
B)  decrease down a group and increase across a period. 
C)  increase down a group and increase across a period. 
D)  increase down a group and remain constant across a period. 
E)  increase down a group and decrease across a period. 
A)  decrease down a group and remain constant across a period. 
B)  decrease down a group and increase across a period. 
C)  increase down a group and increase across a period. 
D)  increase down a group and remain constant across a period. 
E)  increase down a group and decrease across a period.

Exam 8: The Structure of Atoms and Periodic Trends

Which of the following ions have the same ground state electron configuration: S2-,N3-,Mg2+,and Br-?

Electron ________ is defined as the energy change for a process in which a gas phase atom acquires an electron.

The f-block elements are also referred to as the ________ and actinides.

Which of the following electron configurations is not allowed?

What is the ground state electron configuration for Cr3+?

Which of the following electron configurations corresponds to the ground state of an atom of a transition element?

Place the following ions in order from smallest to largest ionic radii: K+,Na+,Mg2+,and Al3+.

Explain why the first ionization energy for oxygen is lower than that for nitrogen.

What 2+ ion has the following ground state electron configuration?

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

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

A metal nitride forms when sodium reacts with elemental nitrogen.What is the most likely formula of this metal nitride?

Rank the following atoms in order decreasing atomic radii: C,N,B,Al.

A metal oxide forms when strontium reacts with oxygen.What is the most likely formula of this metal oxide?

How many electrons can be described by the following quantum numbers: n = 6, = 4, = -4?

Which of the following elements would be expected to have chemical and physical properties most similar to those of the barium (Ba)?

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

________ rule states that the most stable arrangement of electrons is that which contains the maximum number of unpaired electrons,all with the same spin direction.

Which elements have no affinity for electrons?

In general,atomic radii

Basic Concepts of Chemistry

Mathlets 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 Chemistry of Solids

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Reactivity: Chemical Equilibria

The Chemistry of Acids and Bases

Principles of Reactivity: Other Aspects of Aqueous Equilibria

Entropy and Free Energy

Principles of 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 ions have the same ground state electron configuration: S^2-,N^3-,Mg²⁺,and Br^-?

What is the ground state electron configuration for Cr³⁺?

Place the following ions in order from smallest to largest ionic radii: K⁺,Na⁺,Mg²⁺,and Al³⁺.