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- 1. Multiple Choice
What is the energy of an electron at energy level, n = 2 ?
-2.54 x 10-19 J
-5.45 x 10-19 J
-7.58 x 10-19 J
-8.85 x 10-19 J
- 2. Multiple Choice
What is the energy emitted when an electron falls from n = 3 to n = 2 ?
1.25 x 10-19 J
1.33 x 10-19 J
2.45 x 10-19 J
3.03 x 10-19 J
- 3. Multiple Choice
What is the frequency of a photon if the energy emitted during the transition is 3.028 x 10-19 J ?
4.57 x 1014 s-1
5.57 x 1014 s-1
6.57 x 1014 s-1
7.57 x 1014 s-1
- 4. Multiple Choice
What is wavelength of a photon if the energy emitted during the transition is 3.028 x 10-19 J ?
378.4 nm
435.5 nm
565.4 nm
656.5 nm
- 5. Multiple Choice
What is the wavelength of the third line in Balmer series of the hydrogen spectrum ?
434 nm
456 nm
478 nm
485 nm
- 6. Multiple Choice
An electron of a hydrogen atom makes a transition to produce Lyman series. If the photon emitted has a wavelength of 97.2 nm, determine the transition that corresponds to this wavelength.
n = 3 to n = 2
n = 4 to n = 5
n = 5 to n = 4
n = 4 to n = 1
- 7. Multiple Choice
The emission spectrum of hydrogen atom in the visible diagram in the given diagram. Indicate the transition of electron that produces line b. Hence, calculate the wavelength that corresponds to line b.
4.862 x 10-4 m
4.862 x 10-5 m
4.862 x 10-6 m
4.862 x 10-7 m
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