Question 1

Electromagnetic radiation with a wavelength of 640 nm appears as orange light to the human eye.The frequency of this light is ________ s-1.

Accepted Answer

A)   4.688 × 1014
B)   4.688 × 105
C)   1.920 × 102
D)   1.920 × 1011
E)   2.133 × 10-15

Question 2

On the electromagnetic spectrum,visible light is immediately between two other wavelengths.Name them.

Accepted Answer

A)   infrared and gamma ray
B)   radio and gamma ray
C)   gamma ray and ultraviolet x-ray
D)   microwave and ultraviolet x-ray
E)   infrared and ultraviolet

Question 3

For a hydrogen atom,which electronic transition would result in the emission of a photon with the highest energy?

Accepted Answer

A)   2s → 3p
B)   2p → 6d
C)   4p → 2s
D)   5f → 3d

Question 4

Which of the following occurs as the wavelength of a photon increases?

Accepted Answer

A)   The frequency decreases.
B)   The energy increases.
C)   The speed decreases.
D)   Planck's constant increases.
E)   None of the above occurs as the wavelength of a photon increases.

Question 5

Calculate the wavelength of an electron (m = 9.11 × 10-28 g) moving at 3.66 × 106 m/s.

Accepted Answer

A)   1.99 × 10-10 m
B)   5.03 × 10-10 m
C)   1.81 × 10-10 m
D)   5.52 × 10-9 m
E)   2.76 × 10-9 m

Question 6

Which of the following statements is TRUE?

Accepted Answer

A)   The principal quantum number (n)  describes the shape of an orbital.
B)   The angular momentum quantum number (l)  describes the the size and energy associated with an orbital.
C)   The magnetic quantum number (ml)  describes the orientation of the orbital.
D)   An orbital is the path that an electron follows during its movement in an atom.
E)   All of the above are true.

Question 7

How many different values of ml are possible in the 5p sublevel?

Accepted Answer

A)   2
B)   0
C)   3
D)   6
E)   8

Question 8

How many photons are contained in a flash of green light (525 nm) that contains 189 kJ of energy?

Accepted Answer

A)   5.67 × 1023 photons
B)   2.01 × 1024 photons
C)   1.25 × 1031 photons
D)   4.99 × 1023 photons
E)   7.99 × 1030 photons

Question 9

Calculate the frequency of the red light emitted by a neon sign with a wavelength of 680 nm.

Accepted Answer

A)   2.27 × 1014 s-1
B)   3.80 × 1014 s-1
C)   4.41 × 1014 s-1
D)   5.05 × 1014 s-1
E)   3.40 × 1014 s-1

Question 10

When waves of equal amplitude from two sources are out of phase when they interact,it is called

Accepted Answer

A)   destructive interference.
B)   diffraction.
C)   constructive interference.
D)   effusion.
E)   amplitude.

Question 11

When a wave encounters an obstacle or a slit that is comparable in size to its wavelength,it bends around it.This characteristic is called

Accepted Answer

A)   destructive interference.
B)   diffraction.
C)   constructive interference.
D)   effusion.
E)   amplitude.

Question 12

For n = 3,what are the possible values for l?

Accepted Answer

A)   0
B)   0, 1
C)   0, 1, 2
D)   0, 1, 2, 3

Question 13

Which of the following transitions represent the emission of a photon with the largest energy?

Accepted Answer

A)   n = 2 to n = 1
B)   n = 3 to n = 1
C)   n = 6 to n = 3
D)   n = 1 to n = 4
E)   n = 2 to n = 3

Question 14

Describe how a neon light works.

Accepted Answer

A neon sign contains glass tub...

Question 15

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...

Question 16

When waves of equal amplitude from two sources are in phase when they interact,it is called

Accepted Answer

A)   destructive interference.
B)   diffraction.
C)   constructive interference.
D)   effusion.
E)   amplitude.

Question 17

An FM radio station broadcasts electromagnetic radiation at a frequency of 101.2 MHz.The wavelength of this radiation is ________ m.

Accepted Answer

A)   2.964 × 106
B)   2.964
C)   3.036 × 1016
D)   3.036 × 1010
E)   0.3373

Question 18

When an electric current is passed through a tube containing helium,helium atoms absorb some of the electrical energy and reemit it as a ________ color.

Accepted Answer

A)   white
B)   yellow
C)   violet
D)   blue
E)   red

Question 19

What total energy (in kJ) is contained in 1.0 mol of photons,all with a frequency of 2.75 × 1014 Hz?

Accepted Answer

A)   182 kJ
B)   219 kJ
C)   457 kJ
D)   326 kJ
E)   110 kJ

Question 20

Which of the following occurs as the energy of a photon increases?

Accepted Answer

A)   The frequency decreases.
B)   The speed increases.
C)   Planck's constant increases.
D)   The frequency increases.
E)   None of the above occurs as the energy of a photon increases.

Exam 7: The Quantum-Mechanical Model of the Atom

Calculate the frequency of the red light emitted by a neon sign with a wavelength of 680 nm.

Correct AnswerverifiedShow Answer

An FM radio station broadcasts electromagnetic radiation at a frequency of 101.2 MHz.The wavelength of this radiation is ________ m.

Correct AnswerverifiedShow Answer

When an electric current is passed through a tube containing helium,helium atoms absorb some of the electrical energy and reemit it as a ________ color.

Correct AnswerverifiedShow Answer

Electromagnetic radiation with a wavelength of 640 nm appears as orange light to the human eye.The frequency of this light is ________ s-1.

Correct AnswerverifiedShow Answer

Which of the following occurs as the wavelength of a photon increases?

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

Describe how a neon light works.

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

On the electromagnetic spectrum,visible light is immediately between two other wavelengths.Name them.

Correct AnswerverifiedShow Answer

When waves of equal amplitude from two sources are in phase when they interact,it is called

Correct AnswerverifiedShow Answer

Which of the following occurs as the energy of a photon increases?

Correct AnswerverifiedShow Answer

How many photons are contained in a flash of green light (525 nm) that contains 189 kJ of energy?

Correct AnswerverifiedShow Answer

For a hydrogen atom,which electronic transition would result in the emission of a photon with the highest energy?

Correct AnswerverifiedShow Answer

Which of the following statements is TRUE?

Correct AnswerverifiedShow Answer

When a wave encounters an obstacle or a slit that is comparable in size to its wavelength,it bends around it.This characteristic is called

Correct AnswerverifiedShow Answer

How many different values of ml are possible in the 5p sublevel?

Correct AnswerverifiedShow Answer

What total energy (in kJ) is contained in 1.0 mol of photons,all with a frequency of 2.75 × 1014 Hz?

Correct AnswerverifiedShow Answer

For n = 3,what are the possible values for l?

Correct AnswerverifiedShow Answer

Calculate the wavelength of an electron (m = 9.11 × 10-28 g) moving at 3.66 × 106 m/s.

Correct AnswerverifiedShow Answer

When waves of equal amplitude from two sources are out of phase when they interact,it is called

Correct AnswerverifiedShow Answer

Which of the following transitions represent the emission of a photon with the largest energy?

Correct AnswerverifiedShow Answer

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Electromagnetic radiation with a wavelength of 640 nm appears as orange light to the human eye.The frequency of this light is ________ s^-1.

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

Correct Answer
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A neon sign contains glass tub...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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How many different values of m_l are possible in the 5p sublevel?

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What total energy (in kJ) is contained in 1.0 mol of photons,all with a frequency of 2.75 × 10¹⁴ Hz?

Correct Answer
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Correct Answer
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Calculate the wavelength of an electron (m = 9.11 × 10^-28 g) moving at 3.66 × 10⁶ m/s.

Correct Answer
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Correct Answer
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Correct Answer
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