Question 1

Protons are being accelerated in a particle accelerator.When the speed of the protons is doubled,their de Broglie wavelength will

Accepted Answer

A) increase by a factor of 4. 
B) increase by a factor of 2. 
C) decrease by a factor of 2. 
D) increase by a factor of $\sqrt { 2 }$ 
E) decrease by a factor of $\sqrt { 2 }$ 
A) increase by a factor of 4. 
B) increase by a factor of 2. 
C) decrease by a factor of 2. 
D) increase by a factor of $\sqrt { 2 }$ 
E) decrease by a factor of $\sqrt { 2 }$ C

Question 2

In a transition from one vibrational state to another,a molecule emits a photon of wavelength 5.56 µm.What is the energy difference between these two states? (c = 3.00 × 108 m/s,h = 6.626 × 10-34 J ∙ s,1 eV = 1.60 × 10-19 J)

Accepted Answer

A) 0.223 eV 
B) 2.23 MeV 
C) 13.6 eV 
D) 13.6 MeV 
E) 0.223 MeV 
A) 0.223 eV 
B) 2.23 MeV 
C) 13.6 eV 
D) 13.6 MeV 
E) 0.223 MeV A

Question 3

What is the wavelength in the Balmer series for 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 B

Question 4

The electron spin quantum number can have values of

Accepted Answer

A) -1/2, -1, 0, +1, +1/2. 
B) -1/2, -1, +1, +1/2. 
C) -1/2, 0, +1/2. 
D) -1/2, +1/2. 
E) only +1/2. 
A) -1/2, -1, 0, +1, +1/2. 
B) -1/2, -1, +1, +1/2. 
C) -1/2, 0, +1/2. 
D) -1/2, +1/2. 
E) only +1/2.

Question 5

The Paschen series is formed by electron transitions that

Accepted Answer

A) end on the n = 1 shell. 
B) begin on the n = 1 shell. 
C) end on the n = 2 shell. 
D) begin on the n = 3 shell. 
E) end on the n = 3 shell. 
A) end on the n = 1 shell. 
B) begin on the n = 1 shell. 
C) end on the n = 2 shell. 
D) begin on the n = 3 shell. 
E) end on the n = 3 shell.

Question 6

In a hydrogen atom,a given electron has ℓ = 7.How many possible values can m1 have?

Accepted Answer

A) 6 
B) 7 
C) 15 
D) 98 
A) 6 
B) 7 
C) 15 
D) 98

Question 7

How many values can the magnetic quantum number have in a hydrogen atom for which the orbital angular momentum quantum number is equal to 8?

Accepted Answer

A) 9 
B) 15 
C) 5 
D) 8 
E) 17 
A) 9 
B) 15 
C) 5 
D) 8 
E) 17

Question 8

Electrons with a speed of 2.1 × 106 m/s are directed towards a 1.0-μm wide slit.An electron detector is placed 1.0 m behind the slit.How wide is the central maximum of the electron diffraction pattern on the detector? (h = 6.626 × 10-34 J ∙ s,melectron = 9.11 × 10-31 kg)

Accepted Answer

A) 690 μm 
B) 350 μm 
C) 1000 μm 
D) 1400 μm 
A) 690 μm 
B) 350 μm 
C) 1000 μm 
D) 1400 μm

Question 9

If the de Broglie wavelength of an electron is 2.4 μm,what is the speed of the electron? $\left( m _ { \text {electron } } = 9.11 \times 10 ^ { - 31 } \mathrm {~kg} , \right.$ $h = 6.626 \times 10 ^{- 34} \mathrm {~J} \cdot \mathrm { s } )$

Accepted Answer

A) 3.0 × 102 m/s 
B) 2.5 × 105 m/s 
C) 1.7 × 103 m/s 
D) 8.3 × 106 m/s 
A) 3.0 × 102 m/s 
B) 2.5 × 105 m/s 
C) 1.7 × 103 m/s 
D) 8.3 × 106 m/s

Question 10

A hydrogen atom is in the 6h state.Which one of the following numbers could be an orbital angular momentum quantum number ℓ for that state?

Accepted Answer

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

Question 11

What frequency must a photon have to change the energy of a hydrogen atom from the n = 2 to the n = 4 state? (h = 6.626 × 10-34 J ∙ s,1 eV = 1.60 × 10-19 J)

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 12

Write out the electron configuration for the ground state of the phosphorus atom,which has 15 electrons.

Accepted Answer

The answer of Write out the electron configuration for the...

Question 13

What is the greatest magnitude of the orbital angular momentum L that you can find in a state with $n = 6 ?$

Accepted Answer

A) 5.48 $\frac { h } { 2 \pi }$ 
B) 5.92 $\frac { h } { 2 \pi }$ 
C) 6 $\frac { h } { 2 \pi }$ 
D) 6.48 $\frac { h } { 2 \pi }$ 
A) 5.48 $\frac { h } { 2 \pi }$ 
B) 5.92 $\frac { h } { 2 \pi }$ 
C) 6 $\frac { h } { 2 \pi }$ 
D) 6.48 $\frac { h } { 2 \pi }$

Question 14

If the maximum possible accuracy in measuring the velocity of a particle increases,the maximum possible accuracy in measuring its position will

Accepted Answer

A) increase. 
B) decrease. 
C) not be affected. 
A) increase. 
B) decrease. 
C) not be affected.

Question 15

A proton has a speed of 7.2 x $10^4$ m/s.What is the energy of a photon that has the same wavelength as the de Broglie wavelength of this proton? (melectron = 9.11 × 10-31 kg,c = 3.00 × 108 m/s,h = 6.626 × 10-34 J ∙ s)

Accepted Answer

A) 230 keV 
B) 150 keV 
C) 300 keV 
D) 370 keV 
E) 440 keV 
A) 230 keV 
B) 150 keV 
C) 300 keV 
D) 370 keV 
E) 440 keV

Question 16

The distance between adjacent orbits in a hydrogen atom

Accepted Answer

A) increases with increasing values of n. 
B) decreases with increasing values of n. 
C) remains constant for all values of n. 
D) varies randomly with increasing values of n. 
A) increases with increasing values of n. 
B) decreases with increasing values of n. 
C) remains constant for all values of n. 
D) varies randomly with increasing values of n.

Question 17

What value of n corresponds to a wavelength of 922.7 nm in the Paschen series?

Accepted Answer

A) 3 
B) 5 
C) 7 
D) 9 
E) 15 
A) 3 
B) 5 
C) 7 
D) 9 
E) 15

Question 18

What is the longest wavelength in the Balmer series?

Accepted Answer

A) 240 nm 
B) 328 nm 
C) 365 nm 
D) 656 nm 
E) 820 nm 
A) 240 nm 
B) 328 nm 
C) 365 nm 
D) 656 nm 
E) 820 nm

Question 19

What is the energy of the photon emitted when a hydrogen atom undergoes a transition from the $n = 20$ state to the $n = 7$ state?

Accepted Answer

A) 0.244 eV 
B) 0.264 eV 
C) 0.283 eV 
D) 0.303 eV 
A) 0.244 eV 
B) 0.264 eV 
C) 0.283 eV 
D) 0.303 eV

Question 20

How many possible sets of electron states (or quantum numbers)are there in the 5f subshell?

Accepted Answer

A) 2 
B) 8 
C) 10 
D) 14 
A) 2 
B) 8 
C) 10 
D) 14

Exam 28: Atomic Physics

Protons are being accelerated in a particle accelerator.When the speed of the protons is doubled,their de Broglie wavelength will

In a transition from one vibrational state to another,a molecule emits a photon of wavelength 5.56 µm.What is the energy difference between these two states? (c = 3.00 × 108 m/s,h = 6.626 × 10-34 J ∙ s,1 eV = 1.60 × 10-19 J)

What is the wavelength in the Balmer series for n = 15?

The electron spin quantum number can have values of

The Paschen series is formed by electron transitions that

In a hydrogen atom,a given electron has ℓ = 7.How many possible values can m1 have?

How many values can the magnetic quantum number have in a hydrogen atom for which the orbital angular momentum quantum number is equal to 8?

Electrons with a speed of 2.1 × 106 m/s are directed towards a 1.0-μm wide slit.An electron detector is placed 1.0 m behind the slit.How wide is the central maximum of the electron diffraction pattern on the detector? (h = 6.626 × 10-34 J ∙ s,melectron = 9.11 × 10-31 kg)

A hydrogen atom is in the 6h state.Which one of the following numbers could be an orbital angular momentum quantum number ℓ for that state?

What frequency must a photon have to change the energy of a hydrogen atom from the n = 2 to the n = 4 state? (h = 6.626 × 10-34 J ∙ s,1 eV = 1.60 × 10-19 J)

Write out the electron configuration for the ground state of the phosphorus atom,which has 15 electrons.

What is the greatest magnitude of the orbital angular momentum L that you can find in a state with n=6?n = 6 ?n=6?

If the maximum possible accuracy in measuring the velocity of a particle increases,the maximum possible accuracy in measuring its position will

A proton has a speed of 7.2 x 10410^4104 m/s.What is the energy of a photon that has the same wavelength as the de Broglie wavelength of this proton? (melectron = 9.11 × 10-31 kg,c = 3.00 × 108 m/s,h = 6.626 × 10-34 J ∙ s)

The distance between adjacent orbits in a hydrogen atom

What value of n corresponds to a wavelength of 922.7 nm in the Paschen series?

What is the longest wavelength in the Balmer series?

What is the energy of the photon emitted when a hydrogen atom undergoes a transition from the n=20n = 20n=20 state to the n=7n = 7n=7 state?

How many possible sets of electron states (or quantum numbers)are there in the 5f subshell?

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In a transition from one vibrational state to another,a molecule emits a photon of wavelength 5.56 µm.What is the energy difference between these two states? (c = 3.00 × 10⁸ m/s,h = 6.626 × 10^-34 J ∙ s,1 eV = 1.60 × 10^-19J)

In a hydrogen atom,a given electron has ℓ = 7.How many possible values can m₁ have?

Electrons with a speed of 2.1 × 10⁶ m/s are directed towards a 1.0-μm wide slit.An electron detector is placed 1.0 m behind the slit.How wide is the central maximum of the electron diffraction pattern on the detector? (h = 6.626 × 10^-34 J ∙ s,m_electron = 9.11 × 10^-31 kg)

What frequency must a photon have to change the energy of a hydrogen atom from the n = 2 to the n = 4 state? (h = 6.626 × 10^-34 J ∙ s,1 eV = 1.60 × 10^-19J)

What is the greatest magnitude of the orbital angular momentum L that you can find in a state with $n = 6 ?$

A proton has a speed of 7.2 x $10^4$ m/s.What is the energy of a photon that has the same wavelength as the de Broglie wavelength of this proton? (m_electron = 9.11 × 10^-31 kg,c = 3.00 × 10⁸ m/s,h = 6.626 × 10^-34 J ∙ s)

What is the energy of the photon emitted when a hydrogen atom undergoes a transition from the $n = 20$ state to the $n = 7$ state?