(a) Explanation Given info: For transition (A), the initial principal quantum number is 5 and the final principal quantum number is 2 . For transition (B), the initial principal quantum number is 7 and the final principal quantum number is 2 . For transition (C), the initial principal quantum number is 7 and the final principal quantum number is 6 . Write the expression for the change in the energies of the two energy levels for transition (A). Δ E A = − 13.6 n f A 2 − − 13.6 n i A 2 Here, Δ E A is the change in energy for transition A n f A is the final principal quantum number for transition (A) n i A is the initial principal quantum number for transition (A). Substitute 2 for n f A and 5 for n i A in the above expression to get Δ E A . Δ E A = − 13.6 n f A 2 − − 13.6 n i A 2 = − 13.6 2 2 − − 13.6 5 2 = − 2.856 eV The negative sign indicates emission of energy/light. Therefore, the change in energies between the two levels for transition (A) is 2.856 eV . Write the expression for the change in the energies of the two energy levels for transition (B). Δ E B = − 13.6 n f B 2 − − 13.6 n i B 2 Here, Δ E B is the change in energy for transition B. n f B is the final principal quantum number for transition (B) n i B is the initial principal quantum number for transition (B). Substitute 2 for n f A and 7 for n i A in the above expression to get Δ E B . Δ E B = − 13 (b) To determine The increasing order of frequency of the emitted photons.

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ISBN: 9780134020853

Author: James S. Walker

Publisher: PEARSON

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Question

Chapter 31, Problem 68GP

(a)

To determine

The increasing order of wavelength for the given three transitions.

(b)

To determine

The increasing order of frequency of the emitted photons.

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Chapter 31, Problem 67PCE

Chapter 31, Problem 69GP

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The increasing order of wavelength for the given three transitions.

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The increasing order of wavelength for the given three transitions.

The increasing order of frequency of the emitted photons.

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