Pes graph for carbon. 1182017 60857 pm. Electron a electron b. Pes for elements 1 21 author. Below is the pes of sulfur and a table of successive ionization energies.
Carbon 172 109 01 286 100 aue 10 mjm01 1000 nitrogen 245 01 396 100 aue 10 mjm01 1000 oxygen 131 304 01 526 100 aue 10 mjm01 1000 672 100 fluorine 01 aue 168. The energy scale for the pes is in mjmol 1 mj 1000 kj. 1000 hydrogen 01 100 aue 131 10 mjm01 3. In each case we see three peaks.
There is exactly one peak on this graph whose energy corresponds to an ionization energy in table 72. Pes questions from russ maurer 1. Carbon 172 109 01 286 100 aue 10 mjm01 2s 1000 nitrogen 245 01 396 100 aue 10 mjm01 2s 1000 oxygen. Explore the analytical technique of photoelectron spectroscopy pes.
Thanks to thomas silak for his excel spreadsheet for simulating the spectra in the video. Learn how to interpret a photoelectron spectrum and relate it to the electron configuration of an element. Following my summary of the new exclusion statements this is the first in a series of short blog posts that i intend to write about each of the additions to the new ap chemistry curriculumkeep coming back for more as the series progresses. From the pes analysis of a hydrogen atom.
As the charge on the nucleus increases it takes more and more energy to remove an electron from the n 1 shell until by the time we get to neon it takes. Write your interpretation of the graph in figure 1 based on your. Photoelectron spectrophotometers use high energy radiation uv or x rays to eject electrons from an atom the photoelectron spectrophotometer inputs only one type of radiation with a specific energy because electrons within an atom are in different energy levels different electrons can require different amounts of energy to. I had students cut out and annotate the pes graph peaks with electron configurations orbital diagrams.
The source of radiation for. First up photoelectron spectroscopy pesok i dont really understand the addition of this on a couple of levels. The same phenomenon occurs in the pes spectra for carbon nitrogen oxy gen fluorine and neon as shown in table 35. Depending on the source of ionization energy pes can be divided accordingly into ultraviolet photoelectron spectroscopy ups and x ray photoelectron spectroscopy xps.
The video teaches pes through having students analyze several spectra then has them work through a few extra problems.
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