Chemistry is the study of matter and the changes it undergoes, examining the world around us from both a macroscopic and a submicroscopic perspective. This course emphasizes the fundamental principles that explain how atoms and molecules interact to form the substances we encounter every day. Topics include the structure of atoms and molecules, the periodic table and periodic trends, chemical bonding, and the role of energy in chemical reactions. Students will explore the behavior of solids, liquids, gases, and aqueous solutions, as well as the principles of chemical equilibria, acids and bases, and nuclear chemistry. Laboratory work is a central component of the course, allowing students to apply concepts through hands-on experiments. Investigations include both qualitative analysis (observing and describing chemical properties and changes) and quantitative analysis (measuring and calculating chemical relationships with precision). By the end of the course, students will not only build a strong foundation in chemical principles but also strengthen their problem-solving abilities, scientific reasoning, and appreciation for the role of chemistry in everyday life and in global challenges.