Question 1

The existence of discrete (quantized)energy levels in an atom may be inferred from:

Accepted Answer

A) diffraction of electrons by crystals 
B) X-ray diffraction by crystals 
C) atomic line spectra 
D) experiments on the photoelectric effect 
E) visible spectrum 
A) diffraction of electrons by crystals 
B) X-ray diffraction by crystals 
C) atomic line spectra 
D) experiments on the photoelectric effect 
E) visible spectrum

Question 2

The quantum numbers of the last electron of arsenic could be:

Accepted Answer

A) n = 4,ℓ = 2,mℓ = 1,ms = +1/2 
B) n = 4,ℓ = 1,mℓ = 1,ms = +1/2 
C) n = 3,ℓ = 1,mℓ = 1,ms = +1/2 
D) n = 4,ℓ = 3,mℓ = 1,ms = +1/2 
E) n = 4,ℓ = 1,mℓ = 1/2,ms = 0 
A) n = 4,ℓ = 2,mℓ = 1,ms = +1/2 
B) n = 4,ℓ = 1,mℓ = 1,ms = +1/2 
C) n = 3,ℓ = 1,mℓ = 1,ms = +1/2 
D) n = 4,ℓ = 3,mℓ = 1,ms = +1/2 
E) n = 4,ℓ = 1,mℓ = 1/2,ms = 0

Question 3

What is the frequency associated with radiation of 4.59 × 10-8 cm wavelength?

Accepted Answer

A) 6.54 × 1017 s-1  
B) 6.54 × 1015 s-1  
C) 1.53 × 10-8 s-1  
D) 13.8 s-1  
E) 2.18 × 107 s-1  
A) 6.54 × 1017 s-1  
B) 6.54 × 1015 s-1  
C) 1.53 × 10-8 s-1  
D) 13.8 s-1  
E) 2.18 × 107 s-1

Question 4

The ground state electron configuration of Sc is ________.

Accepted Answer

A) 1s22s22p62d103s1  
B) 1s21p62s22p63d5  
C) 1s22s22p63s23p63d3  
D) 1s22s22p63s23p64s23d1  
E) 1s22s22p63s23p64s24p1 
A) 1s22s22p62d103s1  
B) 1s21p62s22p63d5  
C) 1s22s22p63s23p63d3  
D) 1s22s22p63s23p64s23d1  
E) 1s22s22p63s23p64s24p1

Question 5

The fact that the valence orbital configuration of nitrogen in the ground state is 2s2,2px12py12pz1 is an illustration of:

Accepted Answer

A) the Bohr Theory 
B) Hund's Rule 
C) the Aufbau Principle 
D) the Pauli Exclusion Principle 
E) the Heisenberg Uncertainty Principle 
A) the Bohr Theory 
B) Hund's Rule 
C) the Aufbau Principle 
D) the Pauli Exclusion Principle 
E) the Heisenberg Uncertainty Principle

Question 6

What is the wavelength,in nm,associated with a 2000.kg truck traveling at a speed of 20 m/s,that is,considering the truck to be a "matter" wave?

Accepted Answer

A) 1.33 × 10-29 nm 
B) 2.65 × 10-29 nm 
C) 6.02 × 10-29 nm 
D) 7.50 × 103 nm 
E) 1.66 × 10-29 nm 
A) 1.33 × 10-29 nm 
B) 2.65 × 10-29 nm 
C) 6.02 × 10-29 nm 
D) 7.50 × 103 nm 
E) 1.66 × 10-29 nm

Question 7

How many subshells are there in the shell with n = 4?

Accepted Answer

A) 3 
B) 4 
C) 6 
D) 18 
A) 3 
B) 4 
C) 6 
D) 18

Question 8

The possible value(s)of the orbital angular momentum quantum number of a 3p electron are:

Accepted Answer

A) +1/2,-1/2 
B) -1,0,+1 
C) -1 
D) 0 
E) 1 
A) +1/2,-1/2 
B) -1,0,+1 
C) -1 
D) 0 
E) 1

Question 9

How many unpaired electrons are in the ground state electron configuration of calcium?

Accepted Answer

A) 5 
B) 2 
C) 0 
D) 1 
E) 3 
A) 5 
B) 2 
C) 0 
D) 1 
E) 3

Question 10

Choose the INCORRECT statement concerning electromagnetic radiation.

Accepted Answer

A) Infrared light has a longer wavelength than ultraviolet light. 
B) The greater the frequency of the electromagnetic radiation,the greater the energy of the radiation. 
C) A photon with a wavelength of 5000 angstroms has one-half as much energy as a photon with a wavelength of 2500 angstroms. 
D) The speed of ultraviolet light rays is faster than X-rays in a vacuum. 
E) Electromagnetic radiation is energy transmission in which electric and magnetic fields are propagated as waves. 
A) Infrared light has a longer wavelength than ultraviolet light. 
B) The greater the frequency of the electromagnetic radiation,the greater the energy of the radiation. 
C) A photon with a wavelength of 5000 angstroms has one-half as much energy as a photon with a wavelength of 2500 angstroms. 
D) The speed of ultraviolet light rays is faster than X-rays in a vacuum. 
E) Electromagnetic radiation is energy transmission in which electric and magnetic fields are propagated as waves.

Question 11

Which one of the following set of quantum numbers would not be allowed?

Accepted Answer

A) n = 3,ℓ = 2,mℓ = 1 
B) n = 3,ℓ = 0,mℓ = 0 
C) n = 3,ℓ = 3,mℓ = 1 
D) n = 3,ℓ = 2,mℓ = -1 
E) n = 3,ℓ = 1,mℓ = -1 
A) n = 3,ℓ = 2,mℓ = 1 
B) n = 3,ℓ = 0,mℓ = 0 
C) n = 3,ℓ = 3,mℓ = 1 
D) n = 3,ℓ = 2,mℓ = -1 
E) n = 3,ℓ = 1,mℓ = -1

Question 12

Use the Balmer equation to determine n for the spectral line of wavelength 656 nm.The constant for Balmer's equation is 3.2881 × 1015 s-1.

Accepted Answer

A) 3 
B) 4 
C) 5 
D) 6 
E) 7 
A) 3 
B) 4 
C) 5 
D) 6 
E) 7

Question 13

The following orbitals are placed in the correct filling order:
4f,5d,6s,6p.

Accepted Answer

A) True 
 B)False

Question 14

What are the possible values of n and ml for an electron in a 4p orbital?

Accepted Answer

A) n = 1,2,3,or 4 and ml = 1 
B) n = 1,2,3,or 4 and ml = -2,-1,0,+1,or +2 
C) n = 4 and ml = 1 
D) n = 4 and ml = -1,0,+1 
A) n = 1,2,3,or 4 and ml = 1 
B) n = 1,2,3,or 4 and ml = -2,-1,0,+1,or +2 
C) n = 4 and ml = 1 
D) n = 4 and ml = -1,0,+1

Question 15

What is the wavelength associated with electrons traveling at one one-hundredth the speed of light?

Accepted Answer

A) 243 nm 
B) 0.243 nm 
C) 412 nm 
D) 7.98 × 10-2 nm 
E) 12.5 nm 
A) 243 nm 
B) 0.243 nm 
C) 412 nm 
D) 7.98 × 10-2 nm 
E) 12.5 nm

Question 16

How many valence shell electrons does an atom of boron have?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 5 
E) 13 
A) 1 
B) 2 
C) 3 
D) 5 
E) 13

Question 17

Which of the following statements about electron spin is FALSE?

Accepted Answer

A) An electron produces a magnetic field. 
B) The electron's magnetic field can be oriented in two directions in the presence of an external magnetic field. 
C) Paired electrons produced no net magnetic field. 
D) An experiment with silver atoms passing through a magnetic field seems to prove that electron spin exists. 
E) Electron spin only exists when mℓ = 0. 
A) An electron produces a magnetic field. 
B) The electron's magnetic field can be oriented in two directions in the presence of an external magnetic field. 
C) Paired electrons produced no net magnetic field. 
D) An experiment with silver atoms passing through a magnetic field seems to prove that electron spin exists. 
E) Electron spin only exists when mℓ = 0.

Question 18

What is the energy in joules of a mole of photons with the energy of the 656 nm spectral line of hydrogen?

Accepted Answer

A) 2.62 × 10-7 J 
B) 78.3 J 
C) 3.03 J 
D) 8.73 × 10-25 J 
E) 1.82 × 105 J 
A) 2.62 × 10-7 J 
B) 78.3 J 
C) 3.03 J 
D) 8.73 × 10-25 J 
E) 1.82 × 105 J

Question 19

How many electrons are in the outermost shell of the Ga3+ ion in its ground state?

Accepted Answer

A) 2 
B) 3 
C) 6 
D) 18 
A) 2 
B) 3 
C) 6 
D) 18

Question 20

Niels Bohr promoted the connection between the periodic table and quantum theory.Which of the following statements is INCORRECT?

Accepted Answer

A) The link between the table arrangement and quantum theory is electron configuration. 
B) Elements in the same group have similar electron configurations. 
C) Elements in the same group have the same number of electrons in the outer orbit. 
D) Elements in the same group have the same principle quantum number. 
E) Elements in the same group have the same number of valence electrons. 
A) The link between the table arrangement and quantum theory is electron configuration. 
B) Elements in the same group have similar electron configurations. 
C) Elements in the same group have the same number of electrons in the outer orbit. 
D) Elements in the same group have the same principle quantum number. 
E) Elements in the same group have the same number of valence electrons.

Exam 8: Electrons in Atoms

The existence of discrete (quantized)energy levels in an atom may be inferred from:

The quantum numbers of the last electron of arsenic could be:

What is the frequency associated with radiation of 4.59 × 10-8 cm wavelength?

The ground state electron configuration of Sc is ________.

The fact that the valence orbital configuration of nitrogen in the ground state is 2s2,2px12py12pz1 is an illustration of:

What is the wavelength,in nm,associated with a 2000.kg truck traveling at a speed of 20 m/s,that is,considering the truck to be a "matter" wave?

How many subshells are there in the shell with n = 4?

The possible value(s)of the orbital angular momentum quantum number of a 3p electron are:

How many unpaired electrons are in the ground state electron configuration of calcium?

Choose the INCORRECT statement concerning electromagnetic radiation.

Which one of the following set of quantum numbers would not be allowed?

Use the Balmer equation to determine n for the spectral line of wavelength 656 nm.The constant for Balmer's equation is 3.2881 × 1015 s-1.

The following orbitals are placed in the correct filling order: 4f,5d,6s,6p.

What are the possible values of n and ml for an electron in a 4p orbital?

What is the wavelength associated with electrons traveling at one one-hundredth the speed of light?

How many valence shell electrons does an atom of boron have?

Which of the following statements about electron spin is FALSE?

What is the energy in joules of a mole of photons with the energy of the 656 nm spectral line of hydrogen?

How many electrons are in the outermost shell of the Ga3+ ion in its ground state?

Niels Bohr promoted the connection between the periodic table and quantum theory.Which of the following statements is INCORRECT?

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

What is the frequency associated with radiation of 4.59 × 10^-8 cm wavelength?

The fact that the valence orbital configuration of nitrogen in the ground state is 2s²,2p_x¹2p_y¹2p_z¹ is an illustration of:

Use the Balmer equation to determine n for the spectral line of wavelength 656 nm.The constant for Balmer's equation is 3.2881 × 10¹⁵ s^-1.

What are the possible values of n and m_l for an electron in a 4p orbital?

How many electrons are in the outermost shell of the Ga³⁺ ion in its ground state?