Chapter 3: Atoms and Molecules – NCERT Exemplar Solutions for Class 9 Science
This chapter introduces the modern understanding of matter in terms of atoms and molecules. Students learn about Dalton’s Atomic Theory, which explains the indivisible nature of atoms and the laws of chemical combination such as the Law of Conservation of Mass and the Law of Constant Proportions.
The chapter further discusses how elements and compounds are formed by atoms, the concept of atomic mass, and the mole concept for counting particles. Students also study chemical formulae and rules for writing them, which help in understanding how atoms combine to form compounds. NCERT Solutions for Class 9 Science provide solved examples and explanations for the textbook exercises, while NCERT Exemplar Solutions for Class 9 Science strengthen problem-solving through numericals and application-based questions. Mastery of this chapter builds a strong foundation for chemistry in higher classes.