Bohr's Model
In which orbit of hydrogen atom does the electron have an energy of -3.4 eV?
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About This Question
- Subject
- physics
- Chapter
- atoms and nuclei
- Topic
- bohr's model
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
n = 2
- Energy Formula for Hydrogen: According to Bohr's model, the energy of an electron in the nth orbit is:
- En=−n213.6 eV.
- Given Data: The energy is En=−3.4 eV.
- Set up Equation:
- −3.4=−n213.6
- n2=3.413.6
- Calculation:
- n2=4⟹n=4=2.
- Conclusion: The electron is in the 2nd orbit (also known as the first excited state).
This easy difficulty physics question is from the chapter atoms and nuclei, covering the topic of bohr's model. It appeared in the 2025 exam.
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