Question 1

The operation of the electron microscope is based on the particle nature of the electron.

Accepted Answer

A) True 
 B)False

Question 2

The uncertainty principle explains the fact that certain atoms, for instance silver, have different electronic configurations in their ground states than predicted by the aufbau principle.

Accepted Answer

A) True 
 B)False

Question 3

The decrease in atomic radius as one progresses from element Z = 11 to Z = 18 in the periodic table can be attributed to

Accepted Answer

A) the increase in the principal quantum number of the outermost occupied orbital in the atom. 
B) the decrease in the principal quantum number of the outermost occupied orbital in the atom. 
C) the increase in the effective nuclear charge experienced by the electron(s)in the outermost occupied orbital in the atom. 
D) the decrease in the effective nuclear charge experienced by the electron(s)in the outermost occupied orbital in the atom. 
E) the increase in the secondary quantum number of the outermost occupied orbital in the atom. 
A) the increase in the principal quantum number of the outermost occupied orbital in the atom. 
B) the decrease in the principal quantum number of the outermost occupied orbital in the atom. 
C) the increase in the effective nuclear charge experienced by the electron(s)in the outermost occupied orbital in the atom. 
D) the decrease in the effective nuclear charge experienced by the electron(s)in the outermost occupied orbital in the atom. 
E) the increase in the secondary quantum number of the outermost occupied orbital in the atom.

Question 4

Which atom in the set [Ba, Cr, N, Sn, Mg, Se] would you expect to have the largest atomic radius?

Accepted Answer

The answer of Which atom in the set [Ba, Cr,...

Question 5

The electron microscope makes use of the waves associated with very slow moving electrons in order to observe small objects.

Accepted Answer

A) True 
 B)False

Question 6

Which atom has the largest radius?

Accepted Answer

A) Rb 
B) Na 
C) Al 
D) Ne 
E) O 
A) Rb 
B) Na 
C) Al 
D) Ne 
E) O

Question 7

Which atom in the set [Y, Cr, Mg, N, Ba, As, Sn] has the largest first ionization energy?

Accepted Answer

The answer of Which atom in the set [Y, Cr,...

Question 8

What is the energy required to excite a hydrogen atom by causing an electronic transition from the n = 2 to the n = 5 energy level? Recall that the quantized energies of the levels in the hydrogen atom are given by:

Accepted Answer

The answer of What is the energy required to excite...

Question 9

Which radiation has the lowest frequency?

Accepted Answer

A) gamma rays 
B) infrared radiation 
C) microwave radiation 
D) visible light rays 
E) ultraviolet rays 
A) gamma rays 
B) infrared radiation 
C) microwave radiation 
D) visible light rays 
E) ultraviolet rays

Question 10

A particular energy level in an atom has a value of 3 for the secondary quantum number. What is the maximum number of electrons that can occupy this energy level?

Accepted Answer

The answer of A particular energy level in an atom...

Question 11

Which radiation has the longest wavelength?

Accepted Answer

A) gamma rays 
B) infrared radiation 
C) microwave radiation 
D) ultraviolet rays 
E) red visible light rays 
A) gamma rays 
B) infrared radiation 
C) microwave radiation 
D) ultraviolet rays 
E) red visible light rays

Question 12

The letter designation for the subshell in an atom is based on

Accepted Answer

A) the value of the secondary quantum number, l. 
B) the value of the principal quantum number, n. 
C) the value of the magnetic quantum number, ml. 
D) the value of the spin quantum number, ms. 
E) the transverse polarization of the optical emission from the H atom. 
A) the value of the secondary quantum number, l. 
B) the value of the principal quantum number, n. 
C) the value of the magnetic quantum number, ml. 
D) the value of the spin quantum number, ms. 
E) the transverse polarization of the optical emission from the H atom.

Question 13

Which of the following are expected to be diamagnetic in their ground state electron configurations: S, Xe, Hg, P, Br?

Accepted Answer

A) S, Xe, and Br 
B) Hg, Xe, and Br 
C) Hg and Xe 
D) S, P, and Br 
E) All are diamagnetic. 
A) S, Xe, and Br 
B) Hg, Xe, and Br 
C) Hg and Xe 
D) S, P, and Br 
E) All are diamagnetic.

Question 14

Which radiation has the highest frequency?

Accepted Answer

A) X-rays 
B) ultraviolet rays 
C) radio waves 
D) microwave radiation 
E) infrared radiation 
A) X-rays 
B) ultraviolet rays 
C) radio waves 
D) microwave radiation 
E) infrared radiation

Question 15

Which of the following choices represent an electron configuration for an oxygen atom in an excited state? Hint: What is the difference between ground state and excited state?

Accepted Answer

A) 1s2 2s2 2p4 
B) 1s2 2s2 2p5 
C) 1s2 2s2 2p3 3s1 
D) 1s2 2s2 2p3 
E) 1s2 2s2 2p6 
A) 1s2 2s2 2p4 
B) 1s2 2s2 2p5 
C) 1s2 2s2 2p3 3s1 
D) 1s2 2s2 2p3 
E) 1s2 2s2 2p6

Question 16

The structure of the periodic table can be correlated with the electron configuration of the elements.

Accepted Answer

A) True 
 B)False

Question 17

A paramagnetic element is an element

Accepted Answer

A) that always has an element in an excited state. 
B) that is missing electrons. 
C) that is attracted to a magnet. 
D) that is not attracted to a magnet. 
E) that forms a molecule with two atoms. 
A) that always has an element in an excited state. 
B) that is missing electrons. 
C) that is attracted to a magnet. 
D) that is not attracted to a magnet. 
E) that forms a molecule with two atoms.

Question 18

The last electron of the aluminum atom is placed in the 3p orbital of lowest energy before placing an electron in any other 3p orbital.

Accepted Answer

A) True 
 B)False

Question 19

How many pairs of electrons are present in the 3d subshell in the ground state electron configuration of the Cu atom?

Accepted Answer

A) 0 
B) 1 
C) 3 
D) 5 
E) 4.5 
A) 0 
B) 1 
C) 3 
D) 5 
E) 4.5

Question 20

A possible set of quantum numbers for an electron in the partially filled subshell in a gallium atom in its ground state configuration would be

Accepted Answer

The answer of A possible set of quantum numbers for...

Exam 8: The Quantum Mechanical Atom

The operation of the electron microscope is based on the particle nature of the electron.

The uncertainty principle explains the fact that certain atoms, for instance silver, have different electronic configurations in their ground states than predicted by the aufbau principle.

The decrease in atomic radius as one progresses from element Z = 11 to Z = 18 in the periodic table can be attributed to

Which atom in the set [Ba, Cr, N, Sn, Mg, Se] would you expect to have the largest atomic radius?

The electron microscope makes use of the waves associated with very slow moving electrons in order to observe small objects.

Which atom has the largest radius?

Which atom in the set [Y, Cr, Mg, N, Ba, As, Sn] has the largest first ionization energy?

What is the energy required to excite a hydrogen atom by causing an electronic transition from the n = 2 to the n = 5 energy level? Recall that the quantized energies of the levels in the hydrogen atom are given by:

Which radiation has the lowest frequency?

A particular energy level in an atom has a value of 3 for the secondary quantum number. What is the maximum number of electrons that can occupy this energy level?

Which radiation has the longest wavelength?

The letter designation for the subshell in an atom is based on

Which of the following are expected to be diamagnetic in their ground state electron configurations: S, Xe, Hg, P, Br?

Which radiation has the highest frequency?

Which of the following choices represent an electron configuration for an oxygen atom in an excited state? Hint: What is the difference between ground state and excited state?

The structure of the periodic table can be correlated with the electron configuration of the elements.

A paramagnetic element is an element

The last electron of the aluminum atom is placed in the 3p orbital of lowest energy before placing an electron in any other 3p orbital.

How many pairs of electrons are present in the 3d subshell in the ground state electron configuration of the Cu atom?

A possible set of quantum numbers for an electron in the partially filled subshell in a gallium atom in its ground state configuration would be

A Very Brief History of Chemistry

Scientific Measurements

Elements, Compounds, and the Periodic Table

The Mole and Stoichiometry

Molecular View of Reactions in Aqueous Solutions

Oxidation-Reduction Reactions

Energy and Chemical Change

The Basics of Chemical Bonding

Theories of Bonding and Structure

Properties of Gases

Intermolecular Attractions and the Properties of Liquids and Solids

Mixtures at the Molecular Level: Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases, a Molecular Look

Acid-Base Equilibria in Aqueous Solutions

Solubility and Simultaneous Equilibria

Thermodynamics

Electrochemistry

Nuclear Reactions and Their Role in Chemistry

Metal Complexes

Organic Compounds, Polymers, and Biochemicals

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