The document provides a year-at-a-glance pacing guide for a Chemistry I course. It outlines the major topics to be covered in each of the four nine-week periods, including: introduction to chemistry, matter and energy, the periodic table, chemical bonding and molecular structures in the first period; nomenclature and formulas, chemical reactions, the mole, and stoichiometry in the second period; states of matter, solutions, acids and bases in the third period; and reaction rates, gas laws, nuclear chemistry, energy and chemical change, and an introduction to organic chemistry in the fourth period.