This Introductory Chemistry course offers students the flexibility to learn on their own schedule through recordings of college-level lectures. This course is intended for students who have not taken high school chemistry or would like to revisit major chemical principles. In this course, the nature of matter is explored with emphasis on chemical bonding, the energy of material relationships, and the phases of matter. Chemical energy and the forms into which it can be converted are described with reference to fossil fuels and renewable energy sources. Special attention is given to the difference between covalent and ionic bonding, as well as the relationship between atoms, elements, and molecules. The use and understanding of conventional terminology is essential to the study and communication of chemistry, so an entire section is devoted to chemical nomenclature following rules established by the International Union of Pure and Applied Chemistry (IUPAC) and the appropriate description of molecules. Additionally, dimensional analysis (mathematical calculations involving a value and a unit) reinforces the quantitative relationships of modern chemical theories which form the foundation of inorganic chemistry and its fundamental applications. This course is designed such that successive lectures build on established principles, beginning with the concept of measurement and its essential role in scientific research.