Class 9 Science — Chapter 4: STRUCTURE OF THE ATOM
Free AI tutor + NCERT notes for Chapter 4: STRUCTURE OF THE ATOM. 6 topics covered. Ask any question by voice or text in Hindi or English.
What you'll learn
- ▸Discovery of Sub-atomic Particles
- ▸Thomson's Atomic Model
- ▸Rutherford's Alpha-Scattering Experiment
- ▸Rutherford's Nuclear Model of the Atom
- ▸Drawbacks of Rutherford's Model
- ▸Bohr's Model of the Atom
Chapter Summary
--- PAGE 1 --- Chapter 4 0964CH04 STRUCTURE OF THE ATOM In Chapter 3, we have learnt that atoms and From these activities, can we conclude molecules are the fundamental building that on rubbing two objects together, they blocks of matter. The existence of different become electrically charged? Where does this kinds of matter is due to different atoms charge come from? This question can be constituting them. Now the questions arise: answered by knowing that an atom is divisible (i) What makes the atom of one element and consists of charged particles. different from the atom of another element? and (ii) Are atoms really indivisible, as Many scientists contributed in revealing proposed by Dalton, or are there smaller the presence of charged particles in an atom. constituents inside the at…
Practice Questions from this Chapter
Tap "Get Solution" on any question to ask our AI tutor.
- Show me an atom's inside. Get Solution →
- Explain electron charges simply. Get Solution →
- Draw Rutherford's experiment. Get Solution →
- Who is credited with the discovery of the electron? Get Solution →
- What did E. Goldstein discover in 1886? Get Solution →
- In Thomson's model of the atom, what did the electrons resemble in a Christmas pudding? Get Solution →
- What are alpha-particles, as used in Rutherford's experiment? Get Solution →
- Who discovered the neutron in 1932? Get Solution →
Did you know?
- 💡 Most of an atom is empty space, even though matter feels solid.
- 💡 Your body contains atoms that are billions of years old from ancient stars.
- 💡 If an atom were a stadium, its nucleus would be a small marble at the center.
- 💡 Electrons orbit the atom's nucleus so fast, they seem to be everywhere at once.
- 💡 Atoms are so tiny that a human hair contains millions of them.
Frequently Asked Questions
How many topics are covered in this chapter?
This chapter covers 6 key topics: Discovery of Sub-atomic Particles, Thomson's Atomic Model, Rutherford's Alpha-Scattering Experiment, Rutherford's Nuclear Model of the Atom, Drawbacks of Rutherford's Model, and more. The BrainWeave AI tutor explains each one with examples.
Is Chapter 4: STRUCTURE OF THE ATOM important for board exams?
Class 9 is a foundation year. Mastering this chapter now will help you build strong fundamentals for the higher classes.
Can I get NCERT solutions for this chapter in Hindi?
Yes. BrainWeave's AI tutor supports Hindi, English, and Hinglish for both voice and text chat. Just ask your question in your preferred language.
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