Chapter 11.2, Problem 2RQ

Interpretation Introduction

Interpretation: The evidence that leads us to believe that energy levels in the hydrogen atom are quantized is to be determined.

Concept introduction: The lowest possible energy state of an atom is called its ground state

Answer to Problem 2RQ

Since, particular colors are emitted that means only certain energy changes occurs meaning that it has quantized energy levels.

Explanation of Solution

Photons are emitted with a certain energy change. This means that the hydrogen atom must have energy levels which are discrete. The Excited hydrogen atoms emit photons of specific wavelengths.

That is, only certain values are allowed.

Conclusion

When photon is emitted by an excited hydrogen atom, a particular energy change takes place in the hydrogen atom.