Demonstrating Void Space in Solids: A Simple Demonstration To Challenge a Powerful Misconception

Abstract

The concept of bridging analogies is used in a simple demonstration to illustrate the substantial quantity of empty space that remains when solid spheres are packed together. The same demonstration also shows that the percentage of empty space is independent of particle size. The demonstration addresses persistent misconceptions about the atomic structure of solids and can help students form an appropriate mental model of the solid state. It can be used in a curriculum that emphasizes materials science or in any introductory chemistry course.

Studying Crystal Structures through the Use of Solid-State Model Kits

“…Considering the recent emphasis on solid-state materials at the undergraduate level, it perhaps is no surprise that there is only a limited collection of published laboratory experiments and classroom demonstrations directly related to construction and manipulation of crystalline models. A search of this Journal − resulted in a few examples from either home-built resources or commercially available kits. One online resource was found that describes kits from the Institute for Chemical Education (ICE), which are the kits utilized in this laboratory experience, and another presented an activity utilizing virtual models of ionic structures .…”