Question 1

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

Accepted Answer

A) neon (Ne) 
B) gallium (Ga) 
C) sodium (Na) 
D) tin (Sn) 
E) chlorine (Cl) 
A) neon (Ne) 
B) gallium (Ga) 
C) sodium (Na) 
D) tin (Sn) 
E) chlorine (Cl)

Question 2

Which of the following orbital diagrams represents a diamagnetic atom?
1s 2s 2p

Accepted Answer

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

Question 3

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

Question 4

Which of the following sets of four quantum numbers (n,l,ml, ms)correctly describes one of the valence electrons in a ground-state radium atom?

Accepted Answer

A) 7 1 0   
B) 6 1 0   
C) 7 2 0   
D) 7 2 0   
E) 7 0 0 +   
A) 7 1 0   
B) 6 1 0   
C) 7 2 0   
D) 7 2 0   
E) 7 0 0 +

Question 5

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

Accepted Answer

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

Question 6

Which of the following orbital occupancy designations is incorrect?

Accepted Answer

A) 3d4 
B) 4d1 
C) 2p4 
D) 1s1 
E) 1s3 
A) 3d4 
B) 4d1 
C) 2p4 
D) 1s1 
E) 1s3

Question 7

Two elements that have the same ground-state valence shell configuration of ns2np2 are

Accepted Answer

A) K and Mg. 
B) O and Se. 
C) Al and Ga. 
D) Ge and Pb. 
E) Mg and Ca. 
A) K and Mg. 
B) O and Se. 
C) Al and Ga. 
D) Ge and Pb. 
E) Mg and Ca.

Question 8

Which principle or rule is violated by the following orbital diagram of an atom in its ground state?
1s 2s 2p

Accepted Answer

A) Pauli exclusion principle 
B) Aufbau principle 
C) No rules or principles are violated by this orbital diagram. 
D) Heisenberg uncertainty principle 
E) Hund's rule 
A) Pauli exclusion principle 
B) Aufbau principle 
C) No rules or principles are violated by this orbital diagram. 
D) Heisenberg uncertainty principle 
E) Hund's rule

Question 9

According to the building-up principle or aufbau principle,which subshell is typically filled next after the 5f subshell?

Accepted Answer

A) 6d 
B) 4p 
C) 7s 
D) 3d 
E) 5s 
A) 6d 
B) 4p 
C) 7s 
D) 3d 
E) 5s

Question 10

The change in energy for which of the following processes corresponds to the second ionization energy of magnesium?

Accepted Answer

A) Mg(g)→ Mg2+(g)+ 2e- 
B) ​Mg(g)→ Mg+(g)+ e- 
C) Mg+(g)→ Mg2+(g)+ e- 
D) Mg-(g)→ Mg(g)+ e- 
E) Mg(g)+ e- → Mg-(g) 
A) Mg(g)→ Mg2+(g)+ 2e- 
B) ​Mg(g)→ Mg+(g)+ e- 
C) Mg+(g)→ Mg2+(g)+ e- 
D) Mg-(g)→ Mg(g)+ e- 
E) Mg(g)+ e- → Mg-(g)

Question 11

Which of the following statements is incorrect?

Accepted Answer

A) A p-block main-group element belonging to period n has a completely filled (n - 1)d subshell. 
B) All noble gases have completely filled shells. 
C) All s-block main-group elements have only one or two valence electrons. 
D) Carbon and silicon have the same number of valence electrons. 
E) All elements in the n = 4 period have a partially or completely filled n = 4 shell. 
A) A p-block main-group element belonging to period n has a completely filled (n - 1)d subshell. 
B) All noble gases have completely filled shells. 
C) All s-block main-group elements have only one or two valence electrons. 
D) Carbon and silicon have the same number of valence electrons. 
E) All elements in the n = 4 period have a partially or completely filled n = 4 shell.

Question 12

The angular momentum quantum number of the two highest-energy valence electrons in an atom of lead is

Accepted Answer

A) 4. 
B) 0. 
C) 1. 
D) 2. 
E) 3. 
A) 4. 
B) 0. 
C) 1. 
D) 2. 
E) 3.

Question 13

Which of the following properties,in general,increases from left to right across a period in the periodic table?

Accepted Answer

A) ionic charge 
B) atomic radius 
C) density 
D) ionization energy 
E) metallic character 
A) ionic charge 
B) atomic radius 
C) density 
D) ionization energy 
E) metallic character

Question 14

What is the total number of electrons in p orbitals in a ground-state iron atom?

Accepted Answer

A) 6 
B) 18 
C) 12 
D) 24 
E) 30 
A) 6 
B) 18 
C) 12 
D) 24 
E) 30

Question 15

The element whose atoms in the ground state have two half-filled orbitals is

Accepted Answer

A) K. 
B) Be. 
C) Tl. 
D) O. 
E) As. 
A) K. 
B) Be. 
C) Tl. 
D) O. 
E) As.

Question 16

Which of the following may represent an excited-state electron configuration for a cobalt atom?

Accepted Answer

A) [Ar]3d54s1 
B) [Ar]3d64s2 
C) [Ar]3d84s1 
D) [Ar]3d64s1 
E) [Ar]3d74s2 
A) [Ar]3d54s1 
B) [Ar]3d64s2 
C) [Ar]3d84s1 
D) [Ar]3d64s1 
E) [Ar]3d74s2

Question 17

Which of the following orbital diagrams represents a paramagnetic atom?
1s 2s 2p

Accepted Answer

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

Question 18

An atom of which of the following elements has the largest first ionization energy?

Accepted Answer

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

Question 19

All of the following ground-state electron configurations are correct except

Accepted Answer

A) Fe:[Ar]4s24d6. 
B) Ca:[Ar]4s2. 
C) In:[Kr]4d105s25p1. 
D) Cu:[Ar]3d104s1. 
E) Xe:[Kr]4d105s25p6. 
A) Fe:[Ar]4s24d6. 
B) Ca:[Ar]4s2. 
C) In:[Kr]4d105s25p1. 
D) Cu:[Ar]3d104s1. 
E) Xe:[Kr]4d105s25p6.

Question 20

An atom of which of the following elements has the smallest ionization energy?

Accepted Answer

A) Cl 
B) P 
C) Si 
D) Na 
E) S 
A) Cl 
B) P 
C) Si 
D) Na 
E) S

Exam 8: Electron Configurations and Periodicity

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

Which of the following orbital diagrams represents a diamagnetic atom? 1s 2s 2p

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

Which of the following sets of four quantum numbers (n,l,ml, ms)correctly describes one of the valence electrons in a ground-state radium atom?

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

Which of the following orbital occupancy designations is incorrect?

Two elements that have the same ground-state valence shell configuration of ns2np2 are

Which principle or rule is violated by the following orbital diagram of an atom in its ground state? 1s 2s 2p

According to the building-up principle or aufbau principle,which subshell is typically filled next after the 5f subshell?

The change in energy for which of the following processes corresponds to the second ionization energy of magnesium?

Which of the following statements is incorrect?

The angular momentum quantum number of the two highest-energy valence electrons in an atom of lead is

Which of the following properties,in general,increases from left to right across a period in the periodic table?

What is the total number of electrons in p orbitals in a ground-state iron atom?

The element whose atoms in the ground state have two half-filled orbitals is

Which of the following may represent an excited-state electron configuration for a cobalt atom?

Which of the following orbital diagrams represents a paramagnetic atom? 1s 2s 2p

An atom of which of the following elements has the largest first ionization energy?

All of the following ground-state electron configurations are correct except

An atom of which of the following elements has the smallest ionization energy?

Chemistry and Measurement

Atoms, molecules, and Ions

Calculations With Chemical Formulas and Equations

Chemical Reactions

The Gaseous State

Thermochemistry

Quantum Theory of the Atom

Ionic and Covalent Bonding

Molecular Geometry and Chemical Bonding Theory

States of Matter; Liquids and Solids

Solutions

Rates of Reaction

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Thermodynamics and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry of the Main-Group Metals

The Transition Elements and Coordination Compounds

Organic Chemistry

Polymer Materials: Synthetic and Biological

Filters

Which of the following sets of four quantum numbers (n,l,ml_, m_s)correctly describes one of the valence electrons in a ground-state radium atom?

Two elements that have the same ground-state valence shell configuration of ns²np² are