CHEM 112 Lecture Notes - Lecture 1: Electrical Resistivity And Conductivity, Thermal Conductivity, Chemical Change
Document Summary
Wednesday, august 26, 2015. Chemistry - study of matter. Microscopic - atoms and molecules. Macroscopic - substances either pure or mixtures. Separation of matter: based on difference of physical and chemical properties. Atoms - smallest particle of matter. Molecules - combination of atoms. Matter - anything with volume and mass. Categorization of matter - based on physical and chemical properties. Critical aspect: separation mixtures - > pure substances. You want to work with pure compounds. Gas or liquid fill the shape of the container while solid retains shape. Chemical properties - how a material undergoes chemical change. Chemical change or chemical reaction - transformation of one or more atoms or molecules into one or more different molecules. Elements - substances can not be broken down into simpler substances by either physical or chemical means. Compounds - substances contains 2 or more elements that can be broken down.
