The spectra of hydrogen and of calcium are shown in Figure...

Name: Problem 30, Chapter 6: Chemistry
Uploaded: 2019-09-19T14:50:10-08:00
Duration: 3 min 22 s
Channel: Matthew Hurlock
Description: The spectra of hydrogen and of calcium are shown in Figure 6.13. What causes the lines in these spectra? Why are the colors of the lines different? Suggest a reason for the observation that the spectrum of calcium is more complicated than the spectrum of hydrogen.

The spectra of hydrogen and of calcium are shown in Figure 6.13. What causes the lines in these spectra? Why are the colors of the lines different? Suggest a reason for the observation that the spectrum of calcium is more complicated than the spectrum of hydrogen.

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Key Concepts

Quantized Energy Levels

Atoms have discrete energy levels where electrons reside. Transitions between these levels occur when electrons absorb or emit energy, leading to the appearance of lines in the spectrum. Each spectral line corresponds to a specific energy difference between these quantized levels.

Electron Transitions and Photon Emission

When electrons move between energy levels, they either absorb or emit photons whose energies are equal to the difference between these levels. The colors of the spectral lines are determined by the energy (and therefore the wavelength) of the emitted or absorbed photons, which vary from element to element.

Complexity of Multi-electron Atom Spectra

Multi-electron atoms, such as calcium, exhibit more complicated spectra than single-electron atoms like hydrogen because of the additional electron-electron interactions. These interactions lead to a greater number of possible energy levels and transitions, resulting in more spectral lines and complex splitting effects in the spectra.

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