Question 1

What is the radius of the smallest Bohr orbit?

Accepted Answer

A)  2.14 × 10-9 m 
B)  1.12 × 10-9 m 
C)  1.56 × 10-11 m 
D)  3.17 × 10-11 m 
E)  5.29 × 10-11 m 
A)  2.14 × 10-9 m 
B)  1.12 × 10-9 m 
C)  1.56 × 10-11 m 
D)  3.17 × 10-11 m 
E)  5.29 × 10-11 m

Question 2

What is the wavelength of the photon emitted when an electron in a hydrogen atom which is in the initial state ni = 8 jumps to the final state nf = 2?

Accepted Answer

A)  205.1 nm 
B)  104.0 nm 
C)  388.8 nm 
D)  486.2 nm 
E)  610.0 nm 
A)  205.1 nm 
B)  104.0 nm 
C)  388.8 nm 
D)  486.2 nm 
E)  610.0 nm

Question 3

In the Bohr model of the hydrogen atom the state of the atom is characterized by a single quantum number n.

Accepted Answer

A) True 
 B)False

Question 4

How many unique quantum states correspond to the lowest possible energy level of an electron in the hydrogen atom?

Accepted Answer

A)  3 
B)  0 
C)  1 
D)  4 
E)  2 
A)  3 
B)  0 
C)  1 
D)  4 
E)  2

Question 5

A hydrogen atom is in the 6h state. Which of the following could be an orbital quantum number?

Accepted Answer

A)  5 
B)  6 
C)  7 
D)  8 
E)  9 
A)  5 
B)  6 
C)  7 
D)  8 
E)  9

Question 6

According to the quantum mechanical model of the hydrogen atom, if the orbital angular momentum quantum number is ℓ, there will be how many permitted magnetic quantum numbers?

Accepted Answer

A)  ℓ/2 
B)  2ℓ 
C)  2ℓ + 1 
D)  2ℓ - 1 
E)  3ℓ 
A)  ℓ/2 
B)  2ℓ 
C)  2ℓ + 1 
D)  2ℓ - 1 
E)  3ℓ

Question 7

Which one of the following is the correct electronic configuration for the sodium atom?

Accepted Answer

A)  1s1 2s2 3p6 2s2 
B)  1s2 2s1 3p6 2s2 
C)  1s1 2s2 2p6 
D)  1s2 2s2 2p6 3s2 
E)  1 s2 2 s2 2 p6 3 s1 
A)  1s1 2s2 3p6 2s2 
B)  1s2 2s1 3p6 2s2 
C)  1s1 2s2 2p6 
D)  1s2 2s2 2p6 3s2 
E)  1 s2 2 s2 2 p6 3 s1

Question 8

What is the minimum energy an incoming electron must have to knock a K shell electron out of an atom of molybdenum (Z = 42)?

Accepted Answer

A)  10.1 × 103 eV 
B)  11.3 × 103 eV 
C)  22.9 × 103 eV 
D)  34.4 × 103 eV 
E)  44.0 × 103 eV 
A)  10.1 × 103 eV 
B)  11.3 × 103 eV 
C)  22.9 × 103 eV 
D)  34.4 × 103 eV 
E)  44.0 × 103 eV

Question 9

What is the wavelength associated with the electron in the n = 6 state of hydrogen?

Accepted Answer

A)  2.99 × 10-9 m 
B)  3.11 × 10-9 m 
C)  4.08 × 10-9 m 
D)  3.99 × 10-9 m 
E)  1.99 × 10-9 m 
A)  2.99 × 10-9 m 
B)  3.11 × 10-9 m 
C)  4.08 × 10-9 m 
D)  3.99 × 10-9 m 
E)  1.99 × 10-9 m

Question 10

Which one of the following properties of the beam of light applies to a laser beam?

Accepted Answer

A)  It is coherent. 
B)  It is incoherent. 
C)  It is diverging. 
D)  It is converging. 
E)  None of the other answers given is correct. 
A)  It is coherent. 
B)  It is incoherent. 
C)  It is diverging. 
D)  It is converging. 
E)  None of the other answers given is correct.

Question 11

The Bohr model correctly predicts the energy for the ground state of the hydrogen atom.

Accepted Answer

A) True 
 B)False

Question 12

Hydrogen atoms can emit four lines with visible colors from red to violet. These four visible lines emitted by hydrogen atoms are produced by electrons

Accepted Answer

A)  that start in the n = 2 level. 
B)  that end up in the n = 2 level. 
C)  that end up in the n = 3 level. 
D)  that end up in the ground state. 
E)  that start in the ground state. 
A)  that start in the n = 2 level. 
B)  that end up in the n = 2 level. 
C)  that end up in the n = 3 level. 
D)  that end up in the ground state. 
E)  that start in the ground state.

Question 13

For the ground state of the hydrogen atom, which of the following represents the correct value of the orbital angular momentum quantum number?

Accepted Answer

A)  -1 
B)  1 
C)  0 
D)  2 
E)  -2 
A)  -1 
B)  1 
C)  0 
D)  2 
E)  -2

Question 14

The emission of light of lower frequency after illumination by a higher frequency is referred to as

Accepted Answer

A)  absorption. 
B)  stimulated emission. 
C)  coherence. 
D)  phosphorescence. 
E)  fluorescence. 
A)  absorption. 
B)  stimulated emission. 
C)  coherence. 
D)  phosphorescence. 
E)  fluorescence.

Question 15

What is the wavelength associated with the electron in the n = 2 state of hydrogen?

Accepted Answer

A)  3.32 × 10-10 m 
B)  2.03 × 10-10 m 
C)  6.66 × 10-10 m 
D)  4.63 × 10-10 m 
E)  8.17 × 10-10 m 
A)  3.32 × 10-10 m 
B)  2.03 × 10-10 m 
C)  6.66 × 10-10 m 
D)  4.63 × 10-10 m 
E)  8.17 × 10-10 m

Exam 31: Atomic Physics

What is the radius of the smallest Bohr orbit?

What is the wavelength of the photon emitted when an electron in a hydrogen atom which is in the initial state ni = 8 jumps to the final state nf = 2?

In the Bohr model of the hydrogen atom the state of the atom is characterized by a single quantum number n.

How many unique quantum states correspond to the lowest possible energy level of an electron in the hydrogen atom?

A hydrogen atom is in the 6h state. Which of the following could be an orbital quantum number?

According to the quantum mechanical model of the hydrogen atom, if the orbital angular momentum quantum number is ℓ, there will be how many permitted magnetic quantum numbers?

Which one of the following is the correct electronic configuration for the sodium atom?

What is the minimum energy an incoming electron must have to knock a K shell electron out of an atom of molybdenum (Z = 42)?

What is the wavelength associated with the electron in the n = 6 state of hydrogen?

Which one of the following properties of the beam of light applies to a laser beam?

The Bohr model correctly predicts the energy for the ground state of the hydrogen atom.

Hydrogen atoms can emit four lines with visible colors from red to violet. These four visible lines emitted by hydrogen atoms are produced by electrons

For the ground state of the hydrogen atom, which of the following represents the correct value of the orbital angular momentum quantum number?

The emission of light of lower frequency after illumination by a higher frequency is referred to as

What is the wavelength associated with the electron in the n = 2 state of hydrogen?

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What is the wavelength of the photon emitted when an electron in a hydrogen atom which is in the initial state n_i = 8 jumps to the final state n_f = 2?