CHE 105 Lecture 1: Chapter 1

• School: University of Kentucky
• Department: Chemistry
• Course: CHE 105
• Professor: Josh Owen

Document Summary

Atoms - submicroscopic particles that constitute the fundamental building blocks of ordinary matter: cannot be broken down any further through chemical means. Molecules two or more atoms joined in a specific geometrical arrangement: atom na, k, li, molecular elements (molecules) n2, m2, o2, compound (molecules) h2o. Always start with a question then an observation. If you can touch it, it is certainly matter. Matter anything which has mass and takes up space. Since it is such a large category, we categorize matter and study different categories: classify by state and composition. Solid atoms or molecules close together: have a definite shape and volume. Liquid - atoms or molecules close but can move freely past each other: have a definite volume but no definite shape, a condensed shape. Gas atoms are very far apart from each other: no definite volume and no definite shape, can move past freely, very compressible.