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In a single hydrogen atom, the electron is excited to its 6th orbit. The maximum number of distinct spectral lines possible when it comes to the ground state is

Correct answer: B. 15

  • A. 12
  • B. 15
  • C. 5
  • D. 22

Explanation

The maximum number of spectral lines emitted when an electron de-excites from state n to the ground state is given by the formula N = n(n-1)/2. For n=6, the number of lines is N = 6(6-1)/2 = 15.

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About Atomic Structure

Atomic structure covers the discovery of the proton, Planck's quantum theory, hydrogen emission spectra and the evidence for quantized energy levels. You will use quantum numbers to describe orbitals, distinguish s, p, d and f orbital shapes, and write electronic configurations, including the correct order of electron filling.

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