This is the first semester of a two-semester introductory chemistry sequence for science, engineering, and pre-med programs. Topics include elements, atomic structure, molecular structure, chemical reactions, stoichiometry, thermochemistry, gases, liquids, and solids. Front Matter 1: Essential Ideas of Chemistry 2: Atoms, Molecules, and Ions 3: Composition of Substances and Solutions 4: Stoichiometry of Chemical Reactions 5: Gases 6: Thermochemistry 7: Electronic Structure and Periodic Properties 8: Chemical Bonding and Molecular Geometry 9: Advanced Theories of Covalent Bonding 10: Liquids and Solids 11: Appendices Back Matter