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AP Chemistry
1.7 Periodic Trends
1.6 Photoelectron Spectroscopy
1.5 Atomic Structure and Electron Configuration
AdvancedMCQConceptual13.3k
A gaseous neutral magnesium atom, \(\text{Mg}(g)\), has the electron configuration \(1s^2 2s^2 2p^6 3s^2\). In its photoelectron spectrum, four distinct peaks are observed corresponding to the \(1s\), \(2s\), \(2p\), and \(3s\) subshells. An experiment is conducted where a valence electron is removed to form a gaseous magnesium cation, \(\text{Mg}^+(g)\), and the photoelectron spectrum of \(\text{Mg}^+(g)\) is recorded. Which of the following best predicts how the binding energies of the remaining electrons in \(\text{Mg}^+(g)\) compare to those in neutral \(\text{Mg}(g)\), and provides the correct explanation?

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