The lines of the Balmer series in the hydrogen spectrum are produced when an electron falls to which energy level?
Correct answer: B. n = 2
- A. n = 1
- B. n = 2
- C. n = 3
- D. n = 4
Explanation
The Balmer series arises from transitions ending at n equal to 2 and it is the only hydrogen series that falls in the visible region, which is why it was discovered first. Transitions ending at n equal to 1 give the Lyman series in the ultraviolet, and those ending at n equal to 3 give the Paschen series in the infrared.
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About Spectrum of Hydrogen
The hydrogen spectrum consists of discrete emission lines produced when electrons fall between quantised energy levels and release photons. Questions use the Rydberg equation, photon energy and wavelength, and identify the Lyman, Balmer, Paschen, Brackett and Pfund series, which differ from continuous spectra.
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