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Topic 1.6 · Photoelectron Spectroscopy

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AP Chemistry · Topic 1.6: Photoelectron SpectroscopyOpen topic

Practice question

Original PrepAtlas question. This is not an official College Board question.

The photoelectron spectrum (PES) of an unknown neutral atom contains four peaks. In order of decreasing binding energy, the peaks have relative heights of 2, 2, 6, and 1. Assume that each peak corresponds to a different occupied subshell and that peak height is proportional to the number of electrons in that subshell. Which ground-state electron configuration is most consistent with the spectrum?
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