This text addresses the basic concepts course of modern chemistry for students with little or no previous preparation. Topics include atomic and molecular structure, stoichiometry, physical states of matter, solutions, acids and bases, and an introduction to organic chemistry (hydrocarbons). Front Matter 1: Chemistry and Measurements 2: Matter and Energy 3: Elements, Atoms, and the Periodic Table 4: Nuclear Chemistry 5: Ionic Bonding and Simple Ionic Compounds 6: Covalent Bonding and Simple Molecular Compounds 7: Introduction to Chemical Reactions 8: Quantities in Chemical Reactions 9: Gases 10: Solutions 11: Chemical Equilibrium 12: Acids and Bases Back Matter