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Science · Class 9Atoms and MoleculesVideo coming soonRead the notes instead
Free notes for this chapterMark as Completed
Laws of Chemical Combination, Atomic and Molecular Mass, Mole Concept and the board questions built on them — roughly 6 marks of the paper.
What this chapter covers
- 1Laws of Chemical Combination
- 2Atomic and Molecular Mass
- 3Mole Concept
- 4Chemical Formulae
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 Atoms and Molecules, SciencePractice Questions
Important questions,board questions,numericals
Practice Now for Atoms and Molecules, SciencePrevious yearquestions withfull solutions
View PYQs for Atoms and Molecules, ScienceSample Paper
Board patternsample paper withmarking scheme
Open Paper for Atoms and Molecules, Science
In the notes
Topics covered
- 01Laws of Chemical Combination22:27
- 02Atomic and Molecular Mass28:49
- 03Mole Concept26:27
- 04Chemical Formulae32:48
After this chapter you can
- Explain laws of chemical combination without reading from the book
- Present atomic and molecular mass in the format the marking scheme rewards
- Attempt every previous year question set on this chapter
- Marks
- 6
- PYQs
- 18
- Video
- 1h 51m
Then do the work
- One-shot revision, 28 minutes
- Formula sheet for this chapter
- Printable summary, 2 pages
Prepare
| Year | Asked as | Marks |
|---|---|---|
| 2025 | Short answer | 4 |
| 2024 | Long answer | 2 |
| 2023 | MCQ set | 6 |
| 2022 | Case based | 4 |
| 2021 | Short answer | 2 |
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