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In contrast, light emitted from rarefied gases heated in a flame, or excited electrically in a glow tube such as the familiar neon sign or mercury vapour light has only certain discrete wavelengths. This document is highly rated by class 9 students and has been viewed 29722 times. Mar 19, 2017 here you can get complete chapter 3 atoms and molecules class 9 notes in one place. Class 9 science chapter 3 ncert solutions ncert solutions class 9 science chapter 3 pdf. Atoms and molecules class 9 notes chapter 3 atoms and molecules are responsible for forming tiny sand particles, gargantuan black holes and everything in between. These summaries work as revision notes as well as important for examination purpose. Ncert class 9 science atoms and molecules ncert book. Here is the list of all the chapters of class 9 science notes. Atoms and molecules in previous classes, students have already read about the presence of atoms as a part of the material. This document is highly rated by class 9 students and has been viewed 749 times. Get detailed summary of the chapters from ncert science textbooks of cbse class 9th.