Class Lecture Notes for CHEM051 at Los Angeles Southwest Community College

The following documents are lecture materials for Chapter 3 that will be used in class. Please download them and bring them to class.


  • Chapter 3, section 3.1 - Classification of Matter
  • Chapter 3, section 3.2 - Elements and Symbols
  • Chapter 3, section 3.3 - The Periodic Table
  • Chapter 3, section 3.4 - The Atom
  • Chapter 3, section 3.5 - Atomic Number and Mass Number
  • Chapter 3, section 3.6 - Isotopes and Atomic Mass
  • Chapter 3, section 3.7 - Electron Energy Levels
  • Chapter 3, section 3.8 - Periodic Trends