Class 9 NCERT • Science Exploration Series (New Syllabus)
Ch 08: Journey Inside the Atom
Select a topic or study module below to explore ancient atomic roots, historical model evolutions, subatomic particle discoveries, Thomson’s and Rutherford’s models, Bohr’s energy levels, neutrons, and comprehensive textbook solutions.
Topic 01 • Roots of Atomic Theory
Exploring Ancient Concepts of Matter, Acharya Kanada’s Parmanus and Early History
Topic 02 • Historical Evolution
Tracing the Progression of Atomic Structures from Indivisible Ideas to Modern Theories
Topic 03 • Subatomic Particles
Investigating Cathode Rays, J.J. Thomson’s Electron Discovery and Charge Properties
Topic 04 • Thomson’s Model
Analyzing the First Model Attempting to Balance Positive and Negative Charges in Atoms
Topic 05 • Rutherford’s Nuclear Model
Examining Gold Foil Scattering Experiments, Empty Space and Dense Nuclei Discoveries
Topic 06 • Bohr’s Atomic Model
Understanding Fixed Circular Orbits, Stability Explanations and Discrete Energy Shells
Topic 07 • Neutrons & Mass
Studying James Chadwick’s Discovery of Neutrons and Components Shaping Atomic Mass
Module 08 • Solutions & Quiz