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Science · Class 9Structure of the AtomVideo coming soonRead the notes instead
Free notes for this chapterMark as Completed
Thomson and Rutherford Models, Bohr's Model, Valency and the board questions built on them — roughly 6 marks of the paper.
What this chapter covers
- 1Thomson and Rutherford Models
- 2Bohr's Model
- 3Valency
- 4Isotopes and Isobars
These lessons are being recorded. The written notes for this chapter are free to download now.
Learning resources
Seedha Notes
Chapter notes withimportant points,examples & format
View Notes for Structure of the Atom, SciencePractice Questions
Important questions,board questions,numericals
Practice Now for Structure of the Atom, SciencePrevious yearquestions withfull solutions
View PYQs for Structure of the Atom, ScienceSample Paper
Board patternsample paper withmarking scheme
Open Paper for Structure of the Atom, Science
In the notes
Topics covered
- 01Thomson and Rutherford Models11:09
- 02Bohr's Model30:42
- 03Valency28:10
- 04Isotopes and Isobars33:15
After this chapter you can
- Explain thomson and rutherford models without reading from the book
- Present bohr's model in the format the marking scheme rewards
- Attempt every previous year question set on this chapter
- Marks
- 6
- PYQs
- 9
- Video
- 1h 43m
Then do the work
- One-shot revision, 26 minutes
- Formula sheet for this chapter
- Printable summary, 2 pages
Prepare
| Year | Asked as | Marks |
|---|---|---|
| 2025 | Case based | 2 |
| 2024 | Short answer | 4 |
| 2023 | Long answer | 2 |
| 2022 | MCQ set | 4 |
| 2021 | Case based | 4 |
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