“Structure of the Atom” is a chapter in the NCERT class IX science textbook. Atoms and molecules are the fundamental building blocks of matter. The existence of different kinds of matter is due to different atoms constituting them. Atoms are indivisible. One of the first indications is that atoms are not indivisible since there are smaller particles inside an atom. The particles that build an atom are called subatomic particles. Covered in this part are:  How are Electrons Distributed in Different Orbits (Shells)?  Valency  Atomic Number and Mass Number  Isotopes  Isobars Download this PPT along with the first PPT that covers the earlier part of the chapter, to understand the topics completely and top your class!

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