A text is for a one-semester introductory course in chemistry. Principal concepts and theories of chemistry are examined from the layman's point of view. Front Matter 1: Chemistry 2: Atoms 3: Atomic Structure 4: Chemical Bonds 5: Chemical Accounting 6: Gases, Liquids, Solids, ... and Intermolecular Forces 7: Acids and Bases 8: Oxidation and Reduction 9: Organic Chemistry 10: Nuclear Chemistry 11: Water Back Matter Thumbnail: Theodor Benfey's arrangement is an example of a continuous (spiral) table. First published in 1964, it explicitly showed the location of lanthanides and actinides. The elements form a two-dimensional spiral, starting from hydrogen, and folding their way around two peninsulas, the transition metals, and lanthanides and actinides. (CC BY-SA 3.0 Unported; Obsuser via Wikipedia )