Question 1

Based on the photoelectric effect,Einstein proposed the idea that

Accepted Answer

A) the energy of a single particle or photon of light is inversely proportional to its frequency. 
B) the wavelength of light is inversely proportional to its frequency. 
C) particles can show characteristics of waves under certain experimental conditions. 
D) the energy of an object is proportional to its mass. 
E) light has particle-like properties. 
A) the energy of a single particle or photon of light is inversely proportional to its frequency. 
B) the wavelength of light is inversely proportional to its frequency. 
C) particles can show characteristics of waves under certain experimental conditions. 
D) the energy of an object is proportional to its mass. 
E) light has particle-like properties. E

Question 2

Which of the following statements is incorrect?

Accepted Answer

A) The set of quantum numbers n = 3,l = 2,ml = 0,ms =   is not permitted because ml = 0. 
B) The set of quantum numbers n = 2,l = 2,ml = 1,ms =   is not permitted because n = l. 
C) The set of quantum numbers n = 3,l = 2,ml = 1,ms =   is permitted. 
D) The set of quantum numbers n = 3,l = 2,ml = 3,ms =   is not permitted because ml exceeds l. 
E) The set of quantum numbers n = 4,l = 3,ml = -1,ms = 0 is not permitted because ms = 0. 
A) The set of quantum numbers n = 3,l = 2,ml = 0,ms =   is not permitted because ml = 0. 
B) The set of quantum numbers n = 2,l = 2,ml = 1,ms =   is not permitted because n = l. 
C) The set of quantum numbers n = 3,l = 2,ml = 1,ms =   is permitted. 
D) The set of quantum numbers n = 3,l = 2,ml = 3,ms =   is not permitted because ml exceeds l. 
E) The set of quantum numbers n = 4,l = 3,ml = -1,ms = 0 is not permitted because ms = 0. A

Question 3

All the following statements about the quantum numbers are true except

Accepted Answer

A) ml has 2l + 1 possible values. 
B) n may take integral values from 1 to ∞. 
C) ml may take integral values of +l to -l,including zero. 
D) l may take integral values from 1 to n - 1. 
E) ms may take only the values of   and   . 
A) ml has 2l + 1 possible values. 
B) n may take integral values from 1 to ∞. 
C) ml may take integral values of +l to -l,including zero. 
D) l may take integral values from 1 to n - 1. 
E) ms may take only the values of   and   . D

Question 4

Rank the following regions of the electromagnetic spectrum in order of decreasing frequency.
X rays,Microwaves,Infrared,Ultraviolet

Accepted Answer

A) infrared,microwaves,ultraviolet,x rays 
B) x rays,microwaves,infrared,ultraviolet 
C) microwaves,infrared,ultraviolet,x rays 
D) microwaves,ultraviolet,infrared,x rays 
E) x rays,ultraviolet,infrared,microwaves 
A) infrared,microwaves,ultraviolet,x rays 
B) x rays,microwaves,infrared,ultraviolet 
C) microwaves,infrared,ultraviolet,x rays 
D) microwaves,ultraviolet,infrared,x rays 
E) x rays,ultraviolet,infrared,microwaves

Question 5

From the Bohr model of the hydrogen atom,we can conclude that the energy required to excite an electron from n = 4 to n = 5 is ____ the energy required to excite an electron from n = 3 to 4.

Accepted Answer

A) less than 
B) greater than 
C) equal to 
D) either equal to or less than 
E) either equal to or greater than 
A) less than 
B) greater than 
C) equal to 
D) either equal to or less than 
E) either equal to or greater than

Question 6

What is the frequency of light emitted when the electron in a hydrogen atom undergoes a transition from level n = 6 to level n = 4?
(c=3.00×108 m/s,h=6.63×10-34 J·s,RH=2.179×10-18 J)

Accepted Answer

A) ​2.63×10-6 Hz 
B) ​​3.8×105 Hz 
C) ​​3.97×1027 Hz 
D) ​​7.57×10-20 Hz 
E) ​​1×1014 Hz 
A) ​2.63×10-6 Hz 
B) ​​3.8×105 Hz 
C) ​​3.97×1027 Hz 
D) ​​7.57×10-20 Hz 
E) ​​1×1014 Hz

Question 7

Who postulated that energy is radiated only when an electron falls from a higher-energy level to a lower-energy level?

Accepted Answer

A) Bohr 
B) Heisenberg 
C) Rutherford 
D) Einstein 
E) Millikan 
A) Bohr 
B) Heisenberg 
C) Rutherford 
D) Einstein 
E) Millikan

Question 8

What is the wavelength of an electron traveling at of 3.74% the speed of light?
(me=9.109×10-31 kg,c=3.00×108 m/s,h=6.63×10-34 J·s)

Accepted Answer

A) ​1.54×1010 m 
B) ​2.43×10-12 m 
C) ​6.49×10-11 m 
D) ​1.54×1012 m 
E) ​6.49×10-13 m 
A) ​1.54×1010 m 
B) ​2.43×10-12 m 
C) ​6.49×10-11 m 
D) ​1.54×1012 m 
E) ​6.49×10-13 m

Question 9

The _____ of a wave is the number of wavelengths of that wave that pass a fixed point in one unit of time and its unit is _____.

Accepted Answer

A) ​frequency,hertz 
B) ​wavelength,meter 
C) ​intensity,candela 
D) ​current,ampere 
E) ​period,second 
A) ​frequency,hertz 
B) ​wavelength,meter 
C) ​intensity,candela 
D) ​current,ampere 
E) ​period,second

Question 10

What is the energy of a photon of electromagnetic radiation with a wavelength of 963.5 nm?​ (c = 3.00 × 108 m/s,h = 6.63 × 10-34 J · s)

Accepted Answer

A) ​   J 
B) ​​   J 
C) ​​   J 
D) ​​   J 
E) ​​   J 
A) ​   J 
B) ​​   J 
C) ​​   J 
D) ​​   J 
E) ​​   J

Question 11

Which of the following statements is incorrect?

Accepted Answer

A) The n = 3 shell has three p orbitals. 
B) Every p subshell has three orbital. 
C) The n = 4 shell has seven f orbitals. 
D) An s orbital has a spherical shape. 
E) The n = 2 shell has five d orbitals. 
A) The n = 3 shell has three p orbitals. 
B) Every p subshell has three orbital. 
C) The n = 4 shell has seven f orbitals. 
D) An s orbital has a spherical shape. 
E) The n = 2 shell has five d orbitals.

Question 12

A photon of red light has a ____ frequency and a ____ wavelength than a photon of blue light.

Accepted Answer

A) lower,longer 
B) higher,shorter 
C) lower,shorter 
D) higher,longer 
E) lower,lower 
A) lower,longer 
B) higher,shorter 
C) lower,shorter 
D) higher,longer 
E) lower,lower

Question 13

What is the value of the principal quantum number for an electron in a 5d orbital?

Accepted Answer

A) -5 
B)    
C) 5 
D)    
E) 2 
A) -5 
B)    
C) 5 
D)    
E) 2

Question 14

A light emitting diode (L.E.D.)emits photons with an energy of   J.What is the energy per mole of photons emitted? ​

Accepted Answer

A) ​   J/mol 
B) ​   J/mol 
C) ​   J/mol 
D) ​   J/mol 
E) ​   J/mol 
A) ​   J/mol 
B) ​   J/mol 
C) ​   J/mol 
D) ​   J/mol 
E) ​   J/mol

Question 15

Which of the following is a representation of a 1s orbital?

Accepted Answer

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

Question 16

What is the energy per mole of photons having a frequency of 8.44 ×1014Hz?
​(c=3.00×108 m/s,h=6.63×10-34 J·s,NA=6.02×1023 mol-1).

Accepted Answer

A) ​2.36×10-31 kJ/mol 
B) ​3.37×102 kJ/mol 
C) ​2.14×1023 kJ/mol 
D) ​1.42×10-10 kJ/mol 
E) ​4×102 kJ/mol 
A) ​2.36×10-31 kJ/mol 
B) ​3.37×102 kJ/mol 
C) ​2.14×1023 kJ/mol 
D) ​1.42×10-10 kJ/mol 
E) ​4×102 kJ/mol

Question 17

An orbital with the quantum numbers n = 5,l = ​2,​ml = -1 may be found in which subshell?

Accepted Answer

A) 5f 
B) 5d 
C) 5p 
D) 5g 
E) 5s 
A) 5f 
B) 5d 
C) 5p 
D) 5g 
E) 5s

Question 18

Which orbital or orbitals is/are specified by the set of quantum numbers n= 2 and l= 1?

Accepted Answer

A) 2p 
B) 3s 
C) 4d 
D) 1f 
E) 2d 
A) 2p 
B) 3s 
C) 4d 
D) 1f 
E) 2d

Question 19

Which type of electromagnetic radiation has the longest wavelength?

Accepted Answer

A) red light 
B) x rays 
C) gamma rays 
D) microwaves 
E) blue light 
A) red light 
B) x rays 
C) gamma rays 
D) microwaves 
E) blue light

Question 20

Which of the following statements is incorrect?

Accepted Answer

A) As the energy of a photon increases,its frequency decreases. 
B) As the wavelength of a photon increases,its energy decreases. 
C) The product of wavelength and frequency of electromagnetic radiation is a constant. 
D) As the wavelength of a photon increases,its frequency decreases. 
E) As the frequency of a photon increases,its wavelength decreases. 
A) As the energy of a photon increases,its frequency decreases. 
B) As the wavelength of a photon increases,its energy decreases. 
C) The product of wavelength and frequency of electromagnetic radiation is a constant. 
D) As the wavelength of a photon increases,its frequency decreases. 
E) As the frequency of a photon increases,its wavelength decreases.

Exam 7: Quantum Theory of the Atom

Based on the photoelectric effect,Einstein proposed the idea that

Which of the following statements is incorrect?

All the following statements about the quantum numbers are true except

Rank the following regions of the electromagnetic spectrum in order of decreasing frequency. X rays,Microwaves,Infrared,Ultraviolet

From the Bohr model of the hydrogen atom,we can conclude that the energy required to excite an electron from n = 4 to n = 5 is ____ the energy required to excite an electron from n = 3 to 4.

What is the frequency of light emitted when the electron in a hydrogen atom undergoes a transition from level n = 6 to level n = 4? (c=3.00×108 m/s,h=6.63×10-34 J·s,RH=2.179×10-18 J)

Who postulated that energy is radiated only when an electron falls from a higher-energy level to a lower-energy level?

What is the wavelength of an electron traveling at of 3.74% the speed of light? (me=9.109×10-31 kg,c=3.00×108 m/s,h=6.63×10-34 J·s)

The _____ of a wave is the number of wavelengths of that wave that pass a fixed point in one unit of time and its unit is _____.

What is the energy of a photon of electromagnetic radiation with a wavelength of 963.5 nm?​ (c = 3.00 × 108 m/s,h = 6.63 × 10-34 J · s)

Which of the following statements is incorrect?

A photon of red light has a ____ frequency and a ____ wavelength than a photon of blue light.

What is the value of the principal quantum number for an electron in a 5d orbital?

A light emitting diode (L.E.D.)emits photons with an energy of J.What is the energy per mole of photons emitted? ​

Which of the following is a representation of a 1s orbital?

What is the energy per mole of photons having a frequency of 8.44 ×1014Hz? ​(c=3.00×108 m/s,h=6.63×10-34 J·s,NA=6.02×1023 mol-1).

An orbital with the quantum numbers n = 5,l = ​2,​ml = -1 may be found in which subshell?

Which orbital or orbitals is/are specified by the set of quantum numbers n= 2 and l= 1?

Which type of electromagnetic radiation has the longest wavelength?

Which of the following statements is incorrect?

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What is the frequency of light emitted when the electron in a hydrogen atom undergoes a transition from level n = 6 to level n = 4? (c=3.00×10⁸ m/s,h=6.63×10^-34 J·s,R_H=2.179×10^-18 J)

What is the wavelength of an electron traveling at of 3.74% the speed of light? (m_e=9.109×10^-31 kg,c=3.00×10⁸ m/s,h=6.63×10^-34 J·s)

The _ of a wave is the number of wavelengths of that wave that pass a fixed point in one unit of time and its unit is _.

What is the energy of a photon of electromagnetic radiation with a wavelength of 963.5 nm? (c = 3.00 × 10⁸ m/s,h = 6.63 × 10^-34 J · s)

A photon of red light has a frequency and a wavelength than a photon of blue light.

A light emitting diode (L.E.D.)emits photons with an energy of J.What is the energy per mole of photons emitted?

What is the energy per mole of photons having a frequency of 8.44 ×10¹⁴Hz? (c=3.00×10⁸ m/s,h=6.63×10^-34 J·s,N_A=6.02×10²³ mol^-1).

An orbital with the quantum numbers n = 5,l = 2,m_l = -1 may be found in which subshell?