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Quiz

Lesson 1: Hydrogen Atomic Emission Spectrum and Production of X-Rays — Picture questions (exam style)

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  • Questions count: 17
  • Passing grade: 60%
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1.
Hydrogen atoms excited to n = 3 return to the ground state by all possible routes. Which option is correct?
Hydrogen atoms excited to n = 3 return to the ground state by all possible routes. Which option is correct?
total lines = 4, Balmer lines among them = 3
total lines = 2, Balmer lines among them = 2
total lines = 2, Balmer lines among them = 1
total lines = 3, Balmer lines among them = 1
2.
An X-ray tube runs at 40 kV (spectrum shown). The voltage is changed to 80 kV. Which option is correct?
An X-ray tube runs at 40 kV (spectrum shown). The voltage is changed to 80 kV. Which option is correct?
shortest wavelength × 1/2, characteristic (Kα) wavelengths unchanged
shortest wavelength × 2, characteristic wavelengths decrease
shortest wavelength × 1/4, characteristic wavelengths decrease
shortest wavelength × 1/4, characteristic (Kα) wavelengths unchanged
3.
To which spectral series does the line from the transition shown belong?
To which spectral series does the line from the transition shown belong?
Paschen
Lyman
Brackett
Balmer
4.
Using R = 1.097×107 m−1 and the table, find the frequency of the hydrogen line for the transition n = 5 → n = 4.
Using R = 1.097×10⁷ m⁻¹ and the table, find the frequency of the hydrogen line for the transition n = 5 → n = 4.
2.06×1014 Hz
7.40×1013 Hz
1.48×1014 Hz
1220 Hz
5.
An X-ray tube (50.0 kV, 5.00 mA) converts 2% of its input to X-rays. At what rate is heat produced in the target?
An X-ray tube (50.0 kV, 5.00 mA) converts 2% of its input to X-rays. At what rate is heat produced in the target?
245 W
255 W
5.00 W
200 W
6.
What minimum photon energy ionises a hydrogen atom with its electron in n = 1 and gives the electron 2 eV of kinetic energy? (see diagram)
What minimum photon energy ionises a hydrogen atom with its electron in n = 1 and gives the electron 2 eV of kinetic energy? (see diagram)
15.6 eV
5.40 eV
11.6 eV
27.1 eV
7.
An X-ray tube runs at 40 kV (spectrum shown). The voltage is changed to 20 kV. Which option is correct?
An X-ray tube runs at 40 kV (spectrum shown). The voltage is changed to 20 kV. Which option is correct?
shortest wavelength × 1/2, characteristic wavelengths decrease
shortest wavelength × 1, characteristic (Kα) wavelengths unchanged
shortest wavelength × 1, characteristic wavelengths increase
shortest wavelength × 2, characteristic (Kα) wavelengths unchanged
8.
Using R = 1.097×107 m−1 and the table, find the frequency of the hydrogen line for the transition n = 10 → n = 5.
Using R = 1.097×10⁷ m⁻¹ and the table, find the frequency of the hydrogen line for the transition n = 10 → n = 5.
1.97×1014 Hz
9.87×1013 Hz
1.32×1014 Hz
912 Hz
9.
What minimum photon energy ionises a hydrogen atom with its electron in n = 5 and gives the electron 5 eV of kinetic energy? (see diagram)
What minimum photon energy ionises a hydrogen atom with its electron in n = 5 and gives the electron 5 eV of kinetic energy? (see diagram)
5.54 eV
5.38 eV
11.1 eV
18.6 eV
10.
An X-ray tube runs at 30 kV (spectrum shown). The voltage is changed to 15 kV. Which option is correct?
An X-ray tube runs at 30 kV (spectrum shown). The voltage is changed to 15 kV. Which option is correct?
shortest wavelength × 4, characteristic wavelengths increase
shortest wavelength × 2, characteristic wavelengths increase
shortest wavelength × 2, characteristic (Kα) wavelengths unchanged
shortest wavelength × 1, characteristic wavelengths increase
11.
Using R = 1.097×107 m−1 and the table, find the frequency of the hydrogen line for the transition n = 8 → n = 4.
Using R = 1.097×10⁷ m⁻¹ and the table, find the frequency of the hydrogen line for the transition n = 8 → n = 4.
2.06×1014 Hz
1.54×1014 Hz
3.09×1014 Hz
583 Hz
12.
What minimum photon energy ionises a hydrogen atom with its electron in n = 2 and gives the electron 2 eV of kinetic energy? (see diagram)
What minimum photon energy ionises a hydrogen atom with its electron in n = 2 and gives the electron 2 eV of kinetic energy? (see diagram)
3.51 eV
15.6 eV
1.40 eV
5.40 eV
13.
What minimum photon energy ionises a hydrogen atom with its electron in n = 3 and gives the electron 2 eV of kinetic energy? (see diagram)
What minimum photon energy ionises a hydrogen atom with its electron in n = 3 and gives the electron 2 eV of kinetic energy? (see diagram)
2.85 eV
3.51 eV
7.02 eV
15.6 eV
14.
What minimum photon energy ionises a hydrogen atom with its electron in n = 4 and gives the electron 3.4 eV of kinetic energy? (see diagram)
What minimum photon energy ionises a hydrogen atom with its electron in n = 4 and gives the electron 3.4 eV of kinetic energy? (see diagram)
4.25 eV
17.0 eV
3.94 eV
8.50 eV
15.
An X-ray tube runs at 30 kV (spectrum shown). The voltage is changed to 60 kV. Which option is correct?
An X-ray tube runs at 30 kV (spectrum shown). The voltage is changed to 60 kV. Which option is correct?
shortest wavelength × 2, characteristic (Kα) wavelengths unchanged
shortest wavelength × 1/2, characteristic wavelengths increase
shortest wavelength × 1, characteristic (Kα) wavelengths unchanged
shortest wavelength × 1/2, characteristic (Kα) wavelengths unchanged
16.
An X-ray tube runs at 80 kV (spectrum shown). The voltage is changed to 40 kV. Which option is correct?
An X-ray tube runs at 80 kV (spectrum shown). The voltage is changed to 40 kV. Which option is correct?
shortest wavelength × 2, characteristic (Kα) wavelengths unchanged
shortest wavelength × 2, characteristic wavelengths increase
shortest wavelength × 4, characteristic wavelengths increase
shortest wavelength × 1/2, characteristic (Kα) wavelengths unchanged
17.
An X-ray tube runs at 50 kV (spectrum shown). The voltage is changed to 100 kV. Which option is correct?
An X-ray tube runs at 50 kV (spectrum shown). The voltage is changed to 100 kV. Which option is correct?
shortest wavelength × 1/2, characteristic wavelengths decrease
shortest wavelength × 1/2, characteristic wavelengths increase
shortest wavelength × 1/2, characteristic (Kα) wavelengths unchanged
shortest wavelength × 1, characteristic (Kα) wavelengths unchanged
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