Teachers' Day Special: every notes goes free on 5 September — 5 days to go. See what’s inside

Seedha Education

PhysicsNuclei

Class 12PhysicsChapter 134 marksEasy

Physics · Class 12NucleiVideo coming soonRead the notes instead

Free notes for this chapterMark as Completed

Nuclear Size and Density, Mass Defect and Binding Energy, Radioactive Decay Law and the board questions built on them — roughly 4 marks of the paper.

What this chapter covers

1Nuclear Size and Density
2Mass Defect and Binding Energy
3Radioactive Decay Law
4Fission and Fusion

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 Nuclei, Physics
Practice Questions
Important questions,board questions,numericals
Practice Now for Nuclei, Physics
PYQs
Previous yearquestions withfull solutions
View PYQs for Nuclei, Physics
Sample Paper
Board patternsample paper withmarking scheme
Open Paper for Nuclei, Physics

In the notes

Topics covered

01Nuclear Size and Density11:50
02Mass Defect and Binding Energy12:27
03Radioactive Decay Law11:34
04Fission and Fusion16:28

After this chapter you can

Explain nuclear size and density without reading from the book
Present mass defect and binding energy in the format the marking scheme rewards
Attempt every previous year question set on this chapter

Marks: 4
PYQs: 21
Video: 52m

Then do the work

Practice

Important questions: 36
Board questions: 22
Numericals & applications: 13

Open practice set

Prepare

Board appearances of Nuclei by year
Year	Asked as	Marks
2025	Case based	2
2024	MCQ set	4
2023	Long answer	4
2022	Short answer	6
2021	Case based	6

Recommended for you

Seedha
Physics Part I
Class 12PDF
Physics Part I
4.6(1,104)Rated 4.6 out of 5 from 1104 ratings
₹249₹39938% off
PDF · 212 pages
Best Seller
Seedha
Accountancy: Partnership Firms
Class 12PDF
Accountancy: Partnership Firms
4.8(2,412)Rated 4.8 out of 5 from 2412 ratings
₹199₹34943% off
PDF · 184 pages
Best Seller
Seedha
Business Studies Complete Notes
Class 12Paperback
Business Studies Complete Notes
4.7(1,876)Rated 4.7 out of 5 from 1876 ratings
₹349₹54936% off
Paperback · 236 pages
Best Seller
Seedha
Economics: Macroeconomics Part I
Class 12PDF + Print
Economics: Macroeconomics Part I
4.8(1,341)Rated 4.8 out of 5 from 1341 ratings
₹499₹79938% off
PDF + Paperback · 268 pages

Follow the Seedha path

Target 95+ in Physics

Padho, Likho, Revise and Marks Laao. Chapter 13 of 14 — keep going while the format is fresh.

Next chapter Explore full course