If an atom exists in the excited state n = 5, the maximum number of transitions that take place are:
Correct answer: C. 10
- A. 6
- B. 5
- C. 10
- D. 3
Explanation
To solve such a question, here's an amazing trick! We know that n is 5. Step 1: From the 'n' value, start counting backwards. i.e. 5 4 3 2 1 Step 2 : Now drop the 'n' value and add the rest of the numbers, i.e. 4+3+2+1 = 10 That's your answer!
This question appeared on the ETEA MDCAT 2011 paper, which you can sit online with every answer explained.
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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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