Total number of series in hydrogen spectrum is_____________?
Correct answer: C. five
- A. three
- B. four
- C. five
- D. six
Explanation
The principal hydrogen spectral series are Lyman, Balmer, Paschen, Brackett and Pfund. Counting them gives 5 series, so option c is correct. The likely mistake is choosing four by forgetting either the Brackett or Pfund series.
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About Atomic Spectra
Atoms emit or absorb light at specific wavelengths because electrons occupy quantized energy levels and change levels by absorbing or releasing photons. The topic covers emission and absorption spectra, spectral series, hydrogen’s line spectrum, energy-level transitions, and the relation between wavelength, frequency and photon energy.
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