AICE Chemistry Practice Exam 2025 - Free Chemistry Practice Questions and Study Guide

Increasing the number of electrons in non-polar molecules enhances the effect of temporary dipoles because it raises the likelihood of electron cloud distortions. Temporary dipoles, also known as induced dipoles, occur when fluctuations in electron density create a momentary separation of charge within a molecule.

Molecules with a greater number of electrons possess larger and more polarizable electron clouds. This increased polarizability means that when these electrons shift, they can create stronger temporary dipoles that can influence adjacent molecules, leading to enhanced intermolecular attractions, specifically London dispersion forces.

In non-polar molecules, these momentary dipoles can become significant, especially when comparing molecules of different sizes or those with varying electron counts. Larger molecules or those with more electrons will have a more considerable capacity to induce temporary dipoles in neighboring molecules, ultimately affecting the overall physical properties of the substance, such as its boiling point or solubility.

Thus, having an increased number of electrons effectively amplifies the interaction between non-polar molecules, reinforcing the impact of temporary dipoles.