Question 1

Which of the following statements is true?

Accepted Answer

A)  The emission spectrum of a particular element is always the same and can be used to identify the element.
B)  Part of the Bohr model proposed that electrons in the hydrogen atom are located in "stationary states" or particular orbits around the nucleus.
C)  The uncertainty principle states that we can never know both the exact location and speed of an electron.
D)  An orbital is the volume in which we are most likely to find an electron.
E)  All of the above are true.F) All of the above
G) A) and B)

Question 2

Calculate the frequency of the red light emitted by a neon sign with a wavelength of 659.9 nm.

Accepted Answer

A)  2.20 × 1014 s-1
B)  1.98 × 1014 s-1
C)  4.55 × 1014 s-1
D)  5.05 × 1014 s-1
E)  3.32 × 1014 s-1F) B) and E)
G) A) and B) C

Question 3

Match the following.
-n = 3 to n = 1

Accepted Answer

A)  103 nm
B)  657 nm
C)  7460 nm
D)  122 nm
E)  1280 nmF) A) and B)
G) C) and E)

Question 4

Give the principal level for a 2p sublevel.

Accepted Answer

A)  2
B)  1
C)  0
D)  -1
E)  -2F) B) and C)
G) All of the above

Question 5

For n = 3,what are the possible sublevels?

Accepted Answer

A)  0
B)  0,1
C)  0,1,2
D)  0,1,2,3E) None of the above
F) A) and D)

Question 6

What are the possible values of l if n = 6?

Accepted Answer

A)  6
B)  0,1,2,3,4,or 5
C)  -4,-3,-2,-1,0,+1,+2,+3,or +4
D)  -5,-4,-3,-2,-1,0,+1,+2,+3,+4,or +5E) A) and B)
F) All of the above

Question 7

X-rays pass through many substances that block visible light and are therefore used to image bones and internal organs.Which of the following is a correct statement about X-rays?

Accepted Answer

A)  X-rays have lower energy than visible light.
B)  X-rays have lower frequency than visible light.
C)  X-rays have shorter wavelength than visible light.
D)  X-rays have longer wavelength than visible light.E) C) and D)
F) All of the above

Question 8

Which statement is correct?

Accepted Answer

A)  The probability of finding an electron near the nucleus is very high.
B)  The probability of finding an electron near the nucleus is very low.
C)  An electron can be located all the time within an orbital.
D)  An orbital is a circular path around which electrons revolve round the nucleus.E) C) and D)
F) B) and D) A

Question 9

How many different values of l are possible in the third principal level?

Accepted Answer

A)  1
B)  2
C)  3
D)  0
E)  4F) A) and D)
G) A) and C)

Question 10

What value of l is represented by a d orbital?

Accepted Answer

A)  1
B)  2
C)  0
D)  3E) None of the above
F) B) and C)

Question 11

Which of the following transitions (in a hydrogen atom) represent emission of the longest wavelength photon?

Accepted Answer

A)  n = 1 to n = 2
B)  n = 3 to n = 1
C)  n = 3 to n = 4
D)  n = 4 to n = 2
E)  n = 5 to n = 4F) A) and C)
G) C) and D)

Question 12

Determine the energy change associated with the transition from n = 3 to n = 2 in the hydrogen atom.

Accepted Answer

A)  +3.03 × 10-19 J
B)  -1.82 × 10-19 J
C)  +5.51 × 10-19 J
D)  -3.03 × 10-19 J
E)  +2.69 × 10-19 JF) D) and E)
G) B) and C)

Question 13

For hydrogen,what is the wavelength of the photon emitted when an electron drops from a 4d orbital to a 2p orbital in a hydrogen atom?

Accepted Answer

A)  656.3 nm
B)  486.2 nm
C)  364.6 nm
D)  2.057 × 10-3 nmE) B) and C)
F) All of the above

Question 14

Each of the following sets of quantum numbers is supposed to specify an orbital.Choose the one set of quantum numbers that does not contain an error.

Accepted Answer

A)  n = 4,l = 4,ml = 0
B)  n = 3,l = 2,ml = +3
C)  n = 4,l = 0,ml = -1
D)  n = 3,l = 1,ml = -2
E)  n = 5,l = 3,ml = -3F) C) and E)
G) B) and E) E

Question 15

Describe how a neon light works.

Accepted Answer

A neon sign contains glass tub...

Question 16

Calculate the wavelength (in nm) of the red light emitted by a neon sign with a frequency of
4.74 × 1014 Hz.

Accepted Answer

A)  633 nm
B)  158 nm
C)  142 nm
D)  704 nm
E)  466 nmF) C) and D)
G) D) and E)

Question 17

What is the maximum number of f orbitals that are possible?

Accepted Answer

A)  1
B)  3
C)  7
D)  5E) A) and C)
F) B) and C)

Question 18

Calculate the wavelength (in nm) of the blue light emitted by a mercury lamp with a frequency of
6.88 × 1014 Hz.

Accepted Answer

A)  229 nm
B)  436 nm
C)  206 nm
D)  485 nm
E)  675 nmF) B) and D)
G) None of the above

Question 19

Calculate the energy of the green light emitted,per photon,by a mercury lamp with a frequency of 5.49 × 1014 Hz.

Accepted Answer

A)  2.75 × 10-19 J
B)  3.64 × 10-19 J
C)  5.46 × 10-19 J
D)  1.83 × 10-19 J
E)  4.68 × 10-19 JF) B) and C)
G) C) and E)

Question 20

Why do atoms only emit certain wavelengths of light when they are excited? (Why do line spectra exist?)

Accepted Answer

The energies of atoms are quantized.When...

Exam 7: The Quantum-Mechanical Model of the Atom

Which of the following statements is true?

Correct AnswerverifiedShow Answer

Calculate the frequency of the red light emitted by a neon sign with a wavelength of 659.9 nm.

Correct AnswerverifiedC

Match the following. -n = 3 to n = 1

Correct AnswerverifiedShow Answer

Give the principal level for a 2p sublevel.

Correct AnswerverifiedShow Answer

For n = 3,what are the possible sublevels?

Correct AnswerverifiedShow Answer

What are the possible values of l if n = 6?

Correct AnswerverifiedShow Answer

X-rays pass through many substances that block visible light and are therefore used to image bones and internal organs.Which of the following is a correct statement about X-rays?

Correct AnswerverifiedShow Answer

Which statement is correct?

Correct AnswerverifiedA

How many different values of l are possible in the third principal level?

Correct AnswerverifiedShow Answer

What value of l is represented by a d orbital?

Correct AnswerverifiedShow Answer

Which of the following transitions (in a hydrogen atom) represent emission of the longest wavelength photon?

Correct AnswerverifiedShow Answer

Determine the energy change associated with the transition from n = 3 to n = 2 in the hydrogen atom.

Correct AnswerverifiedShow Answer

For hydrogen,what is the wavelength of the photon emitted when an electron drops from a 4d orbital to a 2p orbital in a hydrogen atom?

Correct AnswerverifiedShow Answer

Each of the following sets of quantum numbers is supposed to specify an orbital.Choose the one set of quantum numbers that does not contain an error.

Correct AnswerverifiedE

Describe how a neon light works.

Correct AnswerverifiedA neon sign contains glass tub...View AnswerShow Answer

Calculate the wavelength (in nm) of the red light emitted by a neon sign with a frequency of 4.74 × 1014 Hz.

Correct AnswerverifiedShow Answer

What is the maximum number of f orbitals that are possible?

Correct AnswerverifiedShow Answer

Calculate the wavelength (in nm) of the blue light emitted by a mercury lamp with a frequency of 6.88 × 1014 Hz.

Correct AnswerverifiedShow Answer

Calculate the energy of the green light emitted,per photon,by a mercury lamp with a frequency of 5.49 × 1014 Hz.

Correct AnswerverifiedShow Answer

Why do atoms only emit certain wavelengths of light when they are excited? (Why do line spectra exist?)

Correct AnswerverifiedThe energies of atoms are quantized.When...View AnswerShow Answer

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C

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A

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E

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A neon sign contains glass tub...
View Answer

Calculate the wavelength (in nm) of the red light emitted by a neon sign with a frequency of 4.74 × 10¹⁴Hz.

Correct Answer
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Correct Answer
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Calculate the wavelength (in nm) of the blue light emitted by a mercury lamp with a frequency of 6.88 × 10¹⁴Hz.

Correct Answer
verified

Calculate the energy of the green light emitted,per photon,by a mercury lamp with a frequency of 5.49 × 10¹⁴ Hz.

Correct Answer
verified

Correct Answer
verified
The energies of atoms are quantized.When...
View Answer