APFIVE Electron Configuration From PES Data
The photoelectron spectrum of an unknown element shows three peaks at binding energies of 1500 kJ/mol, 1000 kJ/mol, and 500 kJ/mol. The relative heights of these peaks are in a 2:3:1 ratio. Which of the following statements best describes a feature of this element’s electron configuration?
A
The element has two electrons in the 1s subshell.
B
The element has three electrons in the 1s subshell.
C
The element has one electron in the 2p subshell.
D
The element has three electrons in the 2s subshell.
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