Question 1

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 2

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

Accepted Answer

A)  Se 
B)  Te 
C)  S 
D)  Po 
E)  O 
A)  Se 
B)  Te 
C)  S 
D)  Po 
E)  O

Question 3

Which of the following statements concerning ground state electron configurations is/are CORRECT?
1)For a hydrogen atom with one electron,the 2s and 2p orbitals have identical energies.
2)For a lithium atom with three electrons,the 2s and 2p orbitals have different energies.
3)The effective nuclear charge felt by an electron in a 2p orbital is greater for a carbon atom than for a boron atom.

Accepted Answer

A)  1 only 
B)  2 only 
C)  3 only 
D)  2 and 3 
E)  1,2,and 3 
A)  1 only 
B)  2 only 
C)  3 only 
D)  2 and 3 
E)  1,2,and 3

Question 4

Which element is found in the p-block of the periodic table?

Accepted Answer

A)  Al 
B)  Ni 
C)  Tb 
D)  Fr 
E)  none of the above 
A)  Al 
B)  Ni 
C)  Tb 
D)  Fr 
E)  none of the above

Question 5

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 6

The change in energy for the following reaction is referred to as the ____ for boron.B(g)+ e- $\to$B-(g)

Accepted Answer

A)  oxidation number 
B)  electron affinity 
C)  electronegativity energy 
D)  first ionization energy 
E)  second ionization energy 
A)  oxidation number 
B)  electron affinity 
C)  electronegativity energy 
D)  first ionization energy 
E)  second ionization energy

Question 7

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 8

Choose the statement that is $\textbf{      true:   }$

Accepted Answer

A)  Outer electrons efficiently shield one another from nuclear charge 
B)  Core electrons effectively shield outer electrons from nuclear charge 
C)  Valence electrons are most difficult of all electrons to remove 
D)  Core electrons have the lowest ionization energies of all electrons 
E)  Two of the above are true. 
A)  Outer electrons efficiently shield one another from nuclear charge 
B)  Core electrons effectively shield outer electrons from nuclear charge 
C)  Valence electrons are most difficult of all electrons to remove 
D)  Core electrons have the lowest ionization energies of all electrons 
E)  Two of the above are true.

Question 9

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

Accepted Answer

A)  oxide ion 
B)  nitride ion 
C)  fluoride ion 
D)  sulfide ion 
E)  magnesium ion 
A)  oxide ion 
B)  nitride ion 
C)  fluoride ion 
D)  sulfide ion 
E)  magnesium ion

Question 10

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

Accepted Answer

A)  ytterbium (Yb) 
B)  holmium (Ho) 
C)  tantalum (Ta) 
D)  aluminum (Al) 
E)  germanium (Ge) 
A)  ytterbium (Yb) 
B)  holmium (Ho) 
C)  tantalum (Ta) 
D)  aluminum (Al) 
E)  germanium (Ge)

Question 11

According to the general trend in electron affinities,which group (or family)of elements tend 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

Question 12

Which of the following statements is/are CORRECT?
1)For any element,the second ionization energy is larger than the first ionization energy.
2)Ionization energy is a positive value for all elements.
3)Ionization energy increases down a group of the periodic table.

Accepted Answer

A)  1 only 
B)  2 only 
C)  3 only 
D)  1 and 2 
E)  1,2 and 3 
A)  1 only 
B)  2 only 
C)  3 only 
D)  1 and 2 
E)  1,2 and 3

Question 13

How many valence electrons does a nitrogen atom have?

Accepted Answer

A)  5 
B)  8 
C)  7 
D)  3 
E)  15 
A)  5 
B)  8 
C)  7 
D)  3 
E)  15

Question 14

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

Accepted Answer

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

Question 15

For which of the following atoms is the 2+ ion diamagnetic in the ground state?

Accepted Answer

A)  Ni 
B)  Fe 
C)  Zn 
D)  Mn 
E)  Cu 
A)  Ni 
B)  Fe 
C)  Zn 
D)  Mn 
E)  Cu

Question 16

Which of the following statements is true concerning the electron configuration [Ar]4p2?

Accepted Answer

A)  This configuration cannot be the ground-state electron configuration for a Ca atom because it violates the Pauli exclusion principle. 
B)  This configuration cannot be the ground-state electron configuration for a Ca atom because it violates Hund's rule. 
C)  This configuration is the ground-state electron configuration for a Ca atom. 
D)  This configuration cannot be the ground-state electron configuration for a Ca atom because it violates the Heisenberg uncertainty principle. 
E)  This configuration cannot be the ground-state electron configuration for a Ca atom because it violates the Aufbau principle. 
A)  This configuration cannot be the ground-state electron configuration for a Ca atom because it violates the Pauli exclusion principle. 
B)  This configuration cannot be the ground-state electron configuration for a Ca atom because it violates Hund's rule. 
C)  This configuration is the ground-state electron configuration for a Ca atom. 
D)  This configuration cannot be the ground-state electron configuration for a Ca atom because it violates the Heisenberg uncertainty principle. 
E)  This configuration cannot be the ground-state electron configuration for a Ca atom because it violates the Aufbau principle.

Question 17

An atom of which of the following elements has the most negative electron affinity?

Accepted Answer

A)  Rb 
B)  As 
C)  Cl 
D)  Br 
E)  Se 
A)  Rb 
B)  As 
C)  Cl 
D)  Br 
E)  Se

Question 18

Which atom has the ground state electronic configuration 1s22s22p63s23p64s23d3?

Accepted Answer

A)  Ga 
B)  V 
C)  As 
D)  Nb 
E)  none 
A)  Ga 
B)  V 
C)  As 
D)  Nb 
E)  none

Question 19

Rank F,Cl,and Br in order of increasing first ionization energy.

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 20

Explain the difference between paramagnetic and ferromagnetic.

Accepted Answer

Elements with unpaired electrons are par

Exam 8: The Structure of Atoms and Periodic Trends

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

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

Which element is found in the p-block of the periodic table?

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

The change in energy for the following reaction is referred to as the ____ for boron.B(g)+ e- →\to→ B-(g)

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

Choose the statement that is true: \textbf{ true: } true:

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

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

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

Which of the following statements is/are CORRECT? 1)For any element,the second ionization energy is larger than the first ionization energy. 2)Ionization energy is a positive value for all elements. 3)Ionization energy increases down a group of the periodic table.

How many valence electrons does a nitrogen atom have?

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

For which of the following atoms is the 2+ ion diamagnetic in the ground state?

Which of the following statements is true concerning the electron configuration [Ar]4p2?

An atom of which of the following elements has the most negative electron affinity?

Which atom has the ground state electronic configuration 1s22s22p63s23p64s23d3?

Rank F,Cl,and Br in order of increasing first ionization energy.

Explain the difference between paramagnetic and ferromagnetic.

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 orbital diagrams represents a diamagnetic atom? 1s $~~~~~~$ $~ $ 2s $~~~~~~$ 2p

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

The change in energy for the following reaction is referred to as the ____ for boron.B(g)+ e^- $\to$ B^-(g)

Choose the statement that is $\textbf{ true: }$

Which of the following statements is true concerning the electron configuration [Ar]4p²?

Which atom has the ground state electronic configuration 1s²2s²2p⁶3s²3p⁶4s²3d³?