Apentix/AP Chemistry/Unit 1: Atomic Structure and Properties/Question

AP Chemistryeasymcq1 pt

In a photoelectron spectrum (PES) of a neutral atom, which peak corresponds to the valence electrons?

A.The peak at the lowest binding energy

B.The peak at the highest binding energy

C.The tallest peak

D.The peak farthest to the left

Explanation

Core Concept

Valence electrons are farthest from the nucleus and feel the most shielding, so they are removed with the least energy. In PES, peaks run from highest binding energy (core, left) to lowest (valence, right).

Correct Answer

AThe peak at the lowest binding energy

More Unit 1: Atomic Structure and Properties practice questions

Try a random question →

Practice more AP Chemistry questions with full explanations

Practice Unit 1: Atomic Structure and Properties Questions →