Question 1

A certain laser radiates with a wavelength of 2488 nm. What is the energy difference, in electron volts, between the two energy levels involved in producing this light?

Accepted Answer

A)  0.50 eV 
B)  0.65 eV 
C)  0.45 eV 
D)  0.60 eV 
E)  0.55 eV 
A)  0.50 eV 
B)  0.65 eV 
C)  0.45 eV 
D)  0.60 eV 
E)  0.55 eV A

Question 2

Consider the Bohr Theory Hydrogen atom in the 2 nd excited state.
(a) Determine the binding energy (eV) of the electron.
(b) What is the radius of the electron orbit?
(c) How far is it from the next higher excited orbit?

Accepted Answer

(a)1.51 eV
(b)0.476 nm
(c)0.370 nm

Question 3

According to Pauli's exclusion principle, how many electrons in an atom may have a particular set of quantum numbers?

Accepted Answer

A)  1 
B)  3 
C)  2 
D)  4 
E)  5 
A)  1 
B)  3 
C)  2 
D)  4 
E)  5 A

Question 4

What is the speed of an electron in the n = 4 Bohr orbit of the hydrogen atom?

Accepted Answer

A)  5.47 × 105 m/s 
B)  310 × 105 m/s 
C)  1.39 × 105 m/s 
D)  1.78 × 105 m/s 
E)  2.18 × 106 m/s 
A)  5.47 × 105 m/s 
B)  310 × 105 m/s 
C)  1.39 × 105 m/s 
D)  1.78 × 105 m/s 
E)  2.18 × 106 m/s

Question 5

What type of spectrum is produced when a high energy electron beam is incident on a metal target producing X-rays?

Accepted Answer

A)  line spectrum 
B)  emission spectrum 
C)  absorption spectrum 
D)  continuous spectrum 
E)  line spectrum superimposed on a continuous spectrum 
A)  line spectrum 
B)  emission spectrum 
C)  absorption spectrum 
D)  continuous spectrum 
E)  line spectrum superimposed on a continuous spectrum

Question 6

What range of electromagnetic radiation is emitted when transitions from higher levels into n = 1 occur in a hydrogen atom?

Accepted Answer

A)  Visible 
B)  Infrared 
C)  Microwave 
D)  X-Ray 
E)  Ultraviolet 
A)  Visible 
B)  Infrared 
C)  Microwave 
D)  X-Ray 
E)  Ultraviolet

Question 7

In a hydrogen atom, the electron makes a transition from the n = 8 to the n = 3 state. What is the wavelength of the emitted photon?

Accepted Answer

A)  9.54 × 10-7 m 
B)  1.13 × 10-6 m 
C)  3.12 × 10-7 m 
D)  4.52 × 10-6 m 
E)  6.34 × 10-7 m 
A)  9.54 × 10-7 m 
B)  1.13 × 10-6 m 
C)  3.12 × 10-7 m 
D)  4.52 × 10-6 m 
E)  6.34 × 10-7 m

Question 8

To which of the following values of n does the shortest wavelength in the Balmer series correspond?

Accepted Answer

A)  3 
B)  5 
C)  7 
D)  1 
E)  ∞ (very large) 
A)  3 
B)  5 
C)  7 
D)  1 
E)  ∞ (very large)

Question 9

What frequency must a photon have if it is to raise an electron in a hydrogen atom from the n = 2 to the n = 4 state?

Accepted Answer

A)  3.06 × 1014 Hz 
B)  6.16 × 1014 Hz 
C)  4.11 × 1014 Hz 
D)  5.20 × 1014 Hz 
E)  9.24 × 1014 Hz 
A)  3.06 × 1014 Hz 
B)  6.16 × 1014 Hz 
C)  4.11 × 1014 Hz 
D)  5.20 × 1014 Hz 
E)  9.24 × 1014 Hz

Question 10

An electron in the hydrogen atom has a wavelength of 1.99 × 10-9 m. To what state of the hydrogen atom does this electron belong?

Accepted Answer

A)  n = 1 
B)  n = 3 
C)  n = 4 
D)  n = 6 
E)  n = 8 
A)  n = 1 
B)  n = 3 
C)  n = 4 
D)  n = 6 
E)  n = 8

Question 11

The electron was discovered in 1897 by the English physicist J. J. Thomson.

Accepted Answer

A) True 
 B)False

Question 12

How many values of the magnetic quantum number, mℓ, correspond to a value of 2 for the orbital quantum number, ℓ?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 13

The Balmer series does not lie in the visible region of the electromagnetic spectrum.

Accepted Answer

A) True 
 B)False

Question 14

The electron in a doubly ionized lithium atom experiences a weaker attractive force than the single electron in a hydrogen atom.

Accepted Answer

A) True 
 B)False

Question 15

The allowed values for the magnetic quantum number, mℓ, are from mℓ = -ℓ to +ℓ.

Accepted Answer

A) True 
 B)False

Question 16

Bohr's model of the structure of an atom includes ideas from both classical and quantum physics.

Accepted Answer

A) True 
 B)False

Question 17

A hydrogen atom is in the 6h state. How many electrons are allowed in this state?

Accepted Answer

A)  22 
B)  18 
C)  14 
D)  10 
E)  6 
A)  22 
B)  18 
C)  14 
D)  10 
E)  6

Question 18

What is the longest wavelength in the Lyman Series?

Accepted Answer

A)  45.60 nm 
B)  91.20 nm 
C)  121.5 nm 
D)  240.1 nm 
E)  365 nm 
A)  45.60 nm 
B)  91.20 nm 
C)  121.5 nm 
D)  240.1 nm 
E)  365 nm

Question 19

What is the wavelength of the emitted photon if an electron in the hydrogen atom makes a transition from the ni = 2 to the nf = 1 state?

Accepted Answer

A)  205.2 nm 
B)  87.5 nm 
C)  91.2 nm 
D)  121.5 nm 
E)  402.1 nm 
A)  205.2 nm 
B)  87.5 nm 
C)  91.2 nm 
D)  121.5 nm 
E)  402.1 nm

Question 20

What is the wavelength in the Balmer series corresponding to a value of n = 15?

Accepted Answer

A)  277.1 nm 
B)  371.1 nm 
C)  188.6 nm 
D)  656 nm 
E)  754.2 nm 
A)  277.1 nm 
B)  371.1 nm 
C)  188.6 nm 
D)  656 nm 
E)  754.2 nm

Exam 31: Atomic Physics

A certain laser radiates with a wavelength of 2488 nm. What is the energy difference, in electron volts, between the two energy levels involved in producing this light?

Consider the Bohr Theory Hydrogen atom in the 2 nd excited state. (a) Determine the binding energy (eV) of the electron. (b) What is the radius of the electron orbit? (c) How far is it from the next higher excited orbit?

According to Pauli's exclusion principle, how many electrons in an atom may have a particular set of quantum numbers?

What is the speed of an electron in the n = 4 Bohr orbit of the hydrogen atom?

What type of spectrum is produced when a high energy electron beam is incident on a metal target producing X-rays?

What range of electromagnetic radiation is emitted when transitions from higher levels into n = 1 occur in a hydrogen atom?

In a hydrogen atom, the electron makes a transition from the n = 8 to the n = 3 state. What is the wavelength of the emitted photon?

To which of the following values of n does the shortest wavelength in the Balmer series correspond?

What frequency must a photon have if it is to raise an electron in a hydrogen atom from the n = 2 to the n = 4 state?

An electron in the hydrogen atom has a wavelength of 1.99 × 10-9 m. To what state of the hydrogen atom does this electron belong?

The electron was discovered in 1897 by the English physicist J. J. Thomson.

How many values of the magnetic quantum number, mℓ, correspond to a value of 2 for the orbital quantum number, ℓ?

The Balmer series does not lie in the visible region of the electromagnetic spectrum.

The electron in a doubly ionized lithium atom experiences a weaker attractive force than the single electron in a hydrogen atom.

The allowed values for the magnetic quantum number, mℓ, are from mℓ = -ℓ to +ℓ.

Bohr's model of the structure of an atom includes ideas from both classical and quantum physics.

A hydrogen atom is in the 6h state. How many electrons are allowed in this state?

What is the longest wavelength in the Lyman Series?

What is the wavelength of the emitted photon if an electron in the hydrogen atom makes a transition from the ni = 2 to the nf = 1 state?

What is the wavelength in the Balmer series corresponding to a value of n = 15?

Introduction to Physics

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Vectors in Physics

Two-Dimensional Kinematics

Newtons Laws of Motion

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Potential Energy and Conservation of Energy

Linear Momentum and Collisions

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Rotational Dynamics and Static Equilibrium

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The Laws of Thermodynamics

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Magnetism

Magnetic Flux and Faradays Law of Induction

Alternating-Current Circuits

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Filters

An electron in the hydrogen atom has a wavelength of 1.99 × 10^-9 m. To what state of the hydrogen atom does this electron belong?

How many values of the magnetic quantum number, m_ℓ, correspond to a value of 2 for the orbital quantum number, ℓ?

The allowed values for the magnetic quantum number, m_ℓ, are from m_ℓ = -ℓ to +ℓ.

What is the wavelength of the emitted photon if an electron in the hydrogen atom makes a transition from the n_i = 2 to the n_f = 1 state?