All questions
AP Chemistry
1.7 Periodic Trends
1.6 Photoelectron Spectroscopy
1.5 Atomic Structure and Electron Configuration
AdvancedMCQConceptual16.1k
A grayscale photoelectron spectroscopy diagram consisting of two vertically stacked rectangular panels sharing a common horizontal axis. The horizontal axis is oriented at the bottom with values decreasing logarithmically from left to right, with major tick marks labeled 1000, 100, 10, 1, and 0.1, and an axis title labeled Binding Energy (MJ/mol). The vertical axis on each panel is labeled Relative Number of Electrons. The top panel is labeled Ne and displays three solid black vertical line peaks: peak 1 at 84 MJ/mol with a relative height of 2, peak 2 at 4.7 MJ/mol with a relative height of 2, and peak 3 at 2.1 MJ/mol with a relative height of 6. The bottom panel is labeled Na and displays four solid black vertical line peaks: peak 1 at 104 MJ/mol with a relative height of 2, peak 2 at 6.8 MJ/mol with a relative height of 2, peak 3 at 3.7 MJ/mol with a relative height of 6, and peak 4 at 0.50 MJ/mol with a relative height of 1. No other peaks, curves, gridlines, labels, or annotations appear.
Photoelectron spectra for ground-state \(\text{Ne}\) and \(\text{Na}\) atoms.
Simulated photoelectron spectra (PES) for isolated, ground-state atoms of \(\text{Ne}\) (atomic number \(10\)) and \(\text{Na}\) (atomic number \(11\)) are shown below.

Which of the following best explains why the valence electron peak for \(\text{Na}\) appears at a substantially lower binding energy (\(\approx 0.50 \text{ MJ/mol}\)) than the valence electron peak for \(\text{Ne}\) (\(\approx 2.1 \text{ MJ/mol}\)), despite \(\text{Na}\) having a greater nuclear charge (\(Z = 11\)) than \(\text{Ne}\) (\(Z = 10\))?

Log In to Continue

Accounts are free! Log in to try this question, see explanations, save progress, and more!

Similar Questions

Tools for a 5

The Quiz Lab library of AP Physics quizzes AP aligned mock tests to help you get a 5. With grading, adaptive explanations, and more. Find a Quiz Find, solve, and grade every AP FRQ ever. Find an FRQ Stuck on AP Chemistry? Get unstuck with an AP specialist.1 to 1 tutors who know the exam inside out. Understand weeks of material in a single session.Find a Tutor Learn AP Physics from scratch, quickly. This is the only course you'll need for the year. A self-paced course with everything you need to get a 5. Trusted by over 15,000 students and 200+ schools. Learn fast, or we'll refund your purchase, backed by our 100% satisfaction guarantee. Explore the Course