Chemistry A, the first of a two-semester course, introduces students to the basic concepts of observation, the history of chemistry, and how to reason and use the scientific method. The course also emphasizes the study of matter and energy with focus on identifying differences between states of matter and physical and chemical properties. Fundamental properties of measurement in chemistry along with how to use scientific notation will be introduced early in the course, and these concepts will be reinforced throughout the remaining units. The relation between atomic models and the Periodic Table will be explained along with ways to use these concepts as tools in the study of chemistry. The remaining units of the course will focus on ions and ionic compounds, molecular compounds, acids and bases, the mole concept, chemical masses, and chemical equations.