Question 1

Electrons can be used to probe the arrangement of atoms on a solid surface if the wavelength of the electrons is comparable with the spacing between the atoms.Which of the following electron velocities would be appropriate for use in this application if the atoms are separated by 0.320 nm?

Accepted Answer

A)  1.24 × 103 m/s
B)  8.06 × 103 m/s
C)  2.27 × 106 m/s
D)  4.41 × 106 m/s
E)  3.00 × 108 m/sF) D) and E)
G) A) and D)

Question 2

Which one of the following sets of quantum numbers is not possible?

Accepted Answer

A)  A
B)  B
C)  C
D)  D
E)  EF) A) and B)
G) A) and C)

Question 3

What is the wavelength of radiation that has a frequency of 5.39 × 1014 s-1? (c = 2.9979 × 108 m/s)

Accepted Answer

A)  1.80 × 10-3 nm
B)  556 nm
C)  618 nm
D)  6180 nm
E)  1.61 × 1023 nmF) D) and E)
G) A) and D)

Question 4

Which ground-state atom has an electron configuration described by the following orbital diagram?

Accepted Answer

A)  antimony
B)  germanium
C)  indium
D)  lead
E)  tinF) C) and D)
G) B) and C)

Question 5

The frequency of the emitted light from a cesium atom is an intensive property.

Accepted Answer

A) True 
 B)False

Question 6

The quantum numbers, n = 4, l = 3, ml = 2, ms = +1/2, represent an electron in a 4f subshell

Accepted Answer

A) True 
 B)False

Question 7

How many unpaired electrons does an atom of sulfur have in its ground state?

Accepted Answer

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

Question 8

Write the ground state electron configuration for Cr.

Accepted Answer

[Ar] 4s¹3d⁵o...

Question 9

What is the wavelength of radiation that has a frequency of 3.4 x 1011 s -1?

Accepted Answer

A)  8.8 x 10-4 nm
B)  8.8 x 105 nm
C)  8.8 x 10-13 nm
D)  1.0 x 1011 nm
E)  1.0 x 10-9 nmF) D) and E)
G) B) and C)

Question 10

The electron in a hydrogen atom falls from an excited energy level to the ground state in two steps, causing the emission of photons with wavelengths of 2624 nm and 97.2 nm, respectively.What is the principal quantum number or shell of the initial excited energy level from which the electron falls?

Accepted Answer

A)  2
B)  3
C)  4
D)  6
E)  8F) D) and E)
G) All of the above

Question 11

Calculate the frequency of the light emitted by a hydrogen atom during a transition of its electron from the n = 4 to the n = 1 principal energy level.Recall that for hydrogen En = -2.18 × 10 -18 J(1/n2)

Accepted Answer

A)  1.35 × 10-51 /s
B)  1.03 × 108 /s
C)  2.06 × 1014 /s
D)  8.22 × 1014 /s
E)  3.08 × 1015 /sF) C) and E)
G) A) and B)

Question 12

Using the figure below, categorize electromagnetic radiation with an energy of 6.6 x 10-16 J/photon. -16 J/photon.   A) Gamma rays B) X rays C) Ultraviolet D) Infrared E) Microwave" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  Gamma rays
B)  X rays
C)  Ultraviolet
D)  Infrared
E)  MicrowaveF) D) and E)
G) A) and B)

Question 13

The quantum numbers, n = 3, l = 1, ml = 0, ms = +1/2, represent an electron in a 3s subshell.

Accepted Answer

A) True 
 B)False

Question 14

In an electron microscope, electrons are accelerated to great velocities.Calculate the wavelength of an electron traveling with a velocity of 7.0 × 103 kilometers per second.The mass of an electron is 9.1 × 10-28 g.

Accepted Answer

A)  1.0 × 10-13 m
B)  1.0 × 10-10 m
C)  1.0 × 10-7 m
D)  1.0 mE) B) and C)
F) C) and D)

Question 15

Calculate the wavelength of a neutron that has a velocity of 250 cm/s.(The mass of a neutron = 1.675 × 10-24 g)

Accepted Answer

A)  1.6 pm
B)  0.016 nm
C)  0.16 nm
D)  160 nm
E)  1.6 × 10-4 mF) A) and D)
G) D) and E)

Question 16

The scattering of helium atoms by a solid can be used to gain information about the lattice of atoms, provided the wavelength of the helium atoms is comparable to the dimensions of the lattice.What is the wavelength, in picometers, of a helium-4 atom with a kinetic energy of 0.10 eV.(mass of 4He = 4.0026 amu; 1 amu = 1.67 × 10-24 g; 1 eV = 1.602 × 10-19 J. h = 6.626 × 10-34 J.s)

Accepted Answer

Question 17

In the following diagram of a wave

Accepted Answer

A)  (a) is amplitude and (b) is wavelength
B)  (a) is frequency and (b) is amplitude
C)  (a) is wavelength and (b) is frequency
D)  (a) is amplitude and (b) is frequency
E)  (a) is wavelength and (b) is amplitudeF) C) and D)
G) B) and E)

Question 18

Which element has the following ground-state electron configuration? 1s22s22p63s2

Accepted Answer

A)  Na
B)  Mg
C)  Al
D)  Si
E)  NeF) A) and B)
G) B) and E)

Question 19

When photons with a wavelength of 310.nm strike a magnesium plate, the maximum velocity of the ejected electrons is 3.45 × 105 m/s.Calculate the binding energy of electrons to the magnesium surface.

Accepted Answer

A)  32.7 kJ/mol
B)  321 kJ/mol
C)  353 kJ/mol
D)  386 kJ/mol
E)  419 kJ/molF) C) and D)
G) A) and C)

Question 20

Which one of the following sets of quantum numbers is not possible?

Accepted Answer

A)  A
B)  B
C)  C
D)  D
E)  EF) C) and D)
G) C) and E)

Exam 7: Quantum Theory and the Electronic Structure of Atoms

What is the wavelength of radiation that has a frequency of 3.4 x 10¹¹ s^-1?

Correct Answer
verified

In an electron microscope, electrons are accelerated to great velocities.Calculate the wavelength of an electron traveling with a velocity of 7.0 × 10³ kilometers per second.The mass of an electron is 9.1 × 10^-28 g.

Correct Answer
verified

Correct Answer
verified

Calculate the frequency of the light emitted by a hydrogen atom during a transition of its electron from the n = 4 to the n = 1 principal energy level.Recall that for hydrogen E_n = -2.18 × 10^-18 J(1/n²)

Correct Answer
verified

Using the figure below, categorize electromagnetic radiation with an energy of 6.6 x 10^-16 J/photon.

Correct Answer
verified

How many unpaired electrons does an atom of sulfur have in its ground state?

Correct Answer
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Which element has the following ground-state electron configuration? 1s²2s²2p⁶3s²

Correct Answer
verified

The quantum numbers, n = 4, l = 3, m_l= 2, m_s= +1/2, represent an electron in a 4f subshell

Correct Answer
verified

The frequency of the emitted light from a cesium atom is an intensive property.

Correct Answer
verified

Electrons can be used to probe the arrangement of atoms on a solid surface if the wavelength of the electrons is comparable with the spacing between the atoms.Which of the following electron velocities would be appropriate for use in this application if the atoms are separated by 0.320 nm?

Correct Answer
verified

The electron in a hydrogen atom falls from an excited energy level to the ground state in two steps, causing the emission of photons with wavelengths of 2624 nm and 97.2 nm, respectively.What is the principal quantum number or shell of the initial excited energy level from which the electron falls?

Correct Answer
verified

The quantum numbers, n = 3, l = 1, m_l= 0, m_s= +1/2, represent an electron in a 3s subshell.

Correct Answer
verified

Which one of the following sets of quantum numbers is not possible?

Correct Answer
verified

What is the wavelength of radiation that has a frequency of 5.39 × 10¹⁴ s^-1? (c = 2.9979 × 10⁸ m/s)

Correct Answer
verified

When photons with a wavelength of 310.nm strike a magnesium plate, the maximum velocity of the ejected electrons is 3.45 × 10⁵ m/s.Calculate the binding energy of electrons to the magnesium surface.

Correct Answer
verified

Which ground-state atom has an electron configuration described by the following orbital diagram?

Correct Answer
verified

Which one of the following sets of quantum numbers is not possible?

Correct Answer
verified

Write the ground state electron configuration for Cr.

Correct Answer
verified
[Ar] 4s¹3d⁵o...
View Answer

Calculate the wavelength of a neutron that has a velocity of 250 cm/s.(The mass of a neutron = 1.675 × 10^-24 g)

Correct Answer
verified

In the following diagram of a wave

Correct Answer
verified

Exam 7: Quantum Theory and the Electronic Structure of Atoms

What is the wavelength of radiation that has a frequency of 3.4 x 1011 s -1?

Correct AnswerverifiedShow Answer

In an electron microscope, electrons are accelerated to great velocities.Calculate the wavelength of an electron traveling with a velocity of 7.0 × 103 kilometers per second.The mass of an electron is 9.1 × 10-28 g.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Calculate the frequency of the light emitted by a hydrogen atom during a transition of its electron from the n = 4 to the n = 1 principal energy level.Recall that for hydrogen En = -2.18 × 10 -18 J(1/n2)

Correct AnswerverifiedShow Answer

Using the figure below, categorize electromagnetic radiation with an energy of 6.6 x 10-16 J/photon.

Correct AnswerverifiedShow Answer

How many unpaired electrons does an atom of sulfur have in its ground state?

Correct AnswerverifiedShow Answer

Which element has the following ground-state electron configuration? 1s22s22p63s2

Correct AnswerverifiedShow Answer

The quantum numbers, n = 4, l = 3, ml = 2, ms = +1/2, represent an electron in a 4f subshell

Correct AnswerverifiedShow Answer

The frequency of the emitted light from a cesium atom is an intensive property.

Correct AnswerverifiedShow Answer

Electrons can be used to probe the arrangement of atoms on a solid surface if the wavelength of the electrons is comparable with the spacing between the atoms.Which of the following electron velocities would be appropriate for use in this application if the atoms are separated by 0.320 nm?

Correct AnswerverifiedShow Answer

The electron in a hydrogen atom falls from an excited energy level to the ground state in two steps, causing the emission of photons with wavelengths of 2624 nm and 97.2 nm, respectively.What is the principal quantum number or shell of the initial excited energy level from which the electron falls?

Correct AnswerverifiedShow Answer

The quantum numbers, n = 3, l = 1, ml = 0, ms = +1/2, represent an electron in a 3s subshell.

Correct AnswerverifiedShow Answer

Which one of the following sets of quantum numbers is not possible?

Correct AnswerverifiedShow Answer

What is the wavelength of radiation that has a frequency of 5.39 × 1014 s-1? (c = 2.9979 × 108 m/s)

Correct AnswerverifiedShow Answer

When photons with a wavelength of 310.nm strike a magnesium plate, the maximum velocity of the ejected electrons is 3.45 × 105 m/s.Calculate the binding energy of electrons to the magnesium surface.

Correct AnswerverifiedShow Answer

Which ground-state atom has an electron configuration described by the following orbital diagram?

Correct AnswerverifiedShow Answer

Which one of the following sets of quantum numbers is not possible?

Correct AnswerverifiedShow Answer

Write the ground state electron configuration for Cr.

Correct Answerverified[Ar] 4s13d5 o...View AnswerShow Answer

Calculate the wavelength of a neutron that has a velocity of 250 cm/s.(The mass of a neutron = 1.675 × 10-24 g)

Correct AnswerverifiedShow Answer

In the following diagram of a wave

Correct AnswerverifiedShow Answer

What is the wavelength of radiation that has a frequency of 3.4 x 10¹¹ s^-1?

Correct Answer
verified

In an electron microscope, electrons are accelerated to great velocities.Calculate the wavelength of an electron traveling with a velocity of 7.0 × 10³ kilometers per second.The mass of an electron is 9.1 × 10^-28 g.

Correct Answer
verified

Correct Answer
verified

Calculate the frequency of the light emitted by a hydrogen atom during a transition of its electron from the n = 4 to the n = 1 principal energy level.Recall that for hydrogen E_n = -2.18 × 10^-18 J(1/n²)

Correct Answer
verified

Using the figure below, categorize electromagnetic radiation with an energy of 6.6 x 10^-16 J/photon.

Correct Answer
verified

Correct Answer
verified

Which element has the following ground-state electron configuration? 1s²2s²2p⁶3s²

Correct Answer
verified

The quantum numbers, n = 4, l = 3, m_l= 2, m_s= +1/2, represent an electron in a 4f subshell

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The quantum numbers, n = 3, l = 1, m_l= 0, m_s= +1/2, represent an electron in a 3s subshell.

Correct Answer
verified

Correct Answer
verified

What is the wavelength of radiation that has a frequency of 5.39 × 10¹⁴ s^-1? (c = 2.9979 × 10⁸ m/s)

Correct Answer
verified

When photons with a wavelength of 310.nm strike a magnesium plate, the maximum velocity of the ejected electrons is 3.45 × 10⁵ m/s.Calculate the binding energy of electrons to the magnesium surface.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
[Ar] 4s¹3d⁵o...
View Answer

Calculate the wavelength of a neutron that has a velocity of 250 cm/s.(The mass of a neutron = 1.675 × 10^-24 g)

Correct Answer
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Correct Answer
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