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For each of the following atomic transitions, state whether the transition is allowed or forbidden, and why:

  1. 4p $\rightarrow$ 3p;
  2. 3p $\rightarrow$ 1s;
  3. 4d $\rightarrow$ 2d;
  4. 5d $\rightarrow$ 3s;
  5. 4s $\rightarrow$ 2p.

Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014. Reprinted by permission of Pearson Education Inc., New York.
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Quick Answer: 
  1. forbidden
  2. allowed
  3. forbidden
  4. forbidden
  5. allowed

Giancoli 7th Edition, Chapter 28, Problem 30


Chapter 28, Problem 30 is solved.

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