Atoms and Nuclei Weightage in JEE Mains 2025

Shivani

Updated On: February 04, 2025 05:51 PM | JEE Main

Atoms and Nuclei chapter is an important part of the Physics Syllabus because of its high weightage in the JEE Main exam. The expected Atoms and Nuclei Weightage in JEE Mains 2025 is 6.50%

Atoms and Nuclei Weightage in JEE Mains 2025

Atoms and Nuclei Weightage in JEE Mains 2025 is expected to be 6.50% as per recent year's trends. Students who planning to appear for the JEE Mains 2025 exam must note that around 2 questions will be asked on this topic through which one can score 8 marks. Some of the important topics in this chapter are Rutherford’s Model of the Atom, the Bohr Model, Nuclear Fission, and Mass-Energy Relations etc. Mastering Atoms and Nuclei topics helps candidates secure good score in the JEE Main 2025 exam . We have provided detailed information on Atoms and Nuclei weightage in JEE Mains 2025 along with the important topics.

Latest Update : JEE Main session 2 registration has begun on the jeemain.nta.nic.in on February 1, 2025 and the last date to register will be February 24, 2025. Candidates can now register themselves and fill in the JEE Main 2025 application form . The candidates who have registered for the JEE Main session 1 and also want to appear for session 2 will have to apply a fresh application and register themselves on the official website. The JEE Main session 2 2025 will be conducted from April 1 - April 8, 2025.

Also Read: JEE Main Previous Year Question Paper

Expected Atoms and Nuclei Weightage in JEE Main 2025

Check the expected weightage for the Atoms and Nuclei Weightage in JEE Main 2025 chapter here in the table.

Chapter from physics

Weightage

Number of questions

Total Marks

Topics in the chapter

Atoms & Nuclei

6.50%

2

8

  • Alpha particle scattering experiment
  • Rutherford model of atoms/Bohr model
  • Energy levels
  • Hydrogen spectrum
  • Size & composition of the nucleus
  • Atomic masses/isotopes/isobars/isotones
  • Radioactivity
  • Alpha, beta, gamma rays and particles & their properties
  • Radioactive decay law
  • Relation of mass and energy
  • Mass defect
  • Binding energy per nucleon (its variation with mass number)
  • Nuclear fusion and fission

Download: JEE Main Physics Syllabus PDF

Weightage of Atoms and Nuclei in the Last Five Years in JEE Mains

Students can check the weightage of Atoms and Nuclei for the last five years.

Year

Number of Questions Asked

2024

2

2023

2

2022

2

2021

2

2018

2

Best Books To Prepare for Atoms & Nuclei Chapter

Here are the best books that can help the students prepare this chapter and the syllabus for physics.

  1. Understanding physics by Freedman and Young
  2. Problems and solutions of physics by Shashi Bhushan Tiwari
  3. Fundamentals of Physics by Halliday, Resnick & Walker
  4. Concepts of Physics (Vol. 1 and 2) by H.C. Verma
  5. Class 11 and 12 Textbooks by NCERT

Preparation-Strategy to Study the Atoms & Nuclei Chapter in Physics

Here is a preparation strategy for the applicants to study the chapter on atoms and nuclei from the physics syllabus.

Preparation Strategy for Atoms & Nuclei

Day

Topics

Tasks

Day 1
  • Alpha particle scattering experiment
  • Rutherford model of atoms/Bohr model
  • Energy levels
  • Hydrogen spectrum

Read all the major concepts of these topics, and practice numerical if any.

Day 2

  • Size & composition of the nucleus
  • Atomic masses/isotopes/isobars/isotones
  • Radioactivity
  • Alpha, beta, gamma rays and particles & their properties

Revise the previous topics and prepare these. Radioactivity is a simple concept; applicants can cover it quickly.

Day 3

  • Radioactive decay law
  • Relation of mass and energy
  • Mass defect
  • Binding energy per nucleon (its variation with mass number)
  • Nuclear fusion and fission

Cover the remaining radioactive concepts and then move on to mass-energy relations and nuclear fusion and fission. These are important topics in this chapter.

Day 4

Practice last year's important questions from this chapter

Look for the sample questions and PYQs for the atoms & Nuclei chapter with solutions. Track the performance by practising this paper.

Related Reads:

We hope this article on Atoms and Nuclei Weightage in JEE Mains 2025 helped enrich the required knowledge to ace the exam. Stay tuned to Collegedekho for the latest updates on JEE Mains 2025.

Are you feeling lost and unsure about what career path to take after completing 12th standard?

Say goodbye to confusion and hello to a bright future!

news_cta

FAQs

Is NTA not conducting JEE Maisn 2025?

The JEE Mains 2025 exam will be conducted by the National Testing Agency (NTA) in 2 sessions: January and April 2025. 

 

When to fill out the JEE Mains form 2025?

The expected date for the application form filling is November 1, 2024. Applicants should keep checking the official website for exact dates.

Which class 12 chapter has more weightage in the exam?

There are many chapters that have high weightage in the JEE Main; chapters like modern physics, optics, and mechanics are some important chapters from the physics syllabus. 

 

Will JEE 2025 be difficult?

Yes, analyzing the trends from the past year, the difficulty level of the exam is high. Mathematics will be comparatively more difficult than physics and chemistry. 

 

What is the expected cutoff for JEE 2025?

The expected cutoff for JEE Mains is 90-92 percentile for general category, 76-77 percentile for EWS, 72-74 percentile for OBC, and so on. 

 

Is the JEE Main syllabus reduced for 2025?

Yes, there are some changes in the JEE Main 2025 syllabus; the final changes will be revealed after the syllabus is released by NTA. 

 

View More

JEE Main Previous Year Question Paper

2022 Physics Shift 1

2022 Physics Shift 2

2022 Chemistry Shift 1

2022 Chemistry Shift 2

2022 Mathematics Shift 1

2022 Mathematics Shift 2

2023 Chemistry Shift 1

2023 Mathematics Shift 1

2023 Physics Shift 2

2023 Mathematics Shift 2

2023 Chemistry Shift 2

2023 Physics Shift 1

2024 Chemistry Shift 1

2024 Mathematics Shift 2

2024 Physics Paper Morning Shift

2024 Mathematics Morning Shift

2024 Physics Shift 2

2024 Chemistry Shift 2

/articles/atoms-and-nuclei-weightage-in-jee-mains/
View All Questions

Related Questions

MY 1 ATTEMPT PRESENTLIE 76 , PLEASE SUGGESTED IMPORVEMENT FOR 2 ATTEMPT

-priyani mondalUpdated on February 14, 2025 04:49 PM
  • 1 Answer
Soham Mitra, Content Team

Take into account the mistakes committed by you in the JEE Main 2025 session 1 exam and modify your preparation plan accordingly. The JEE Main 2025 exam preparation tips will come in handy while studying for the JEE Main 2025 session 2 exam.

READ MORE...

good afternoon i am from hyderabad i hace secured 62 percentile in jee 2025 so will be the hostel fee

-raheem pashaUpdated on February 14, 2025 01:25 PM
  • 1 Answer
Soham Mitra, Content Team

The hostel fee at Jawaharlal Institute of Technology (JIT) in Khargone, Madhya Pradesh is around INR 12,000 for the duration of 4 years.

READ MORE...

Nit with branch on 94.8 percentile in jee mains 2025 of ews category

-jyuthika herwadeUpdated on February 14, 2025 01:30 PM
  • 1 Answer
Soham Mitra, Content Team

With a 94.8 percentile in the JEE Mains 2025 exam from the EWS category, you can expect to avail a seat across several NITs, for branches such as Mechanical Engineering, Electrical Engineering, and Civil Engineering in the lower-ranked NITs, or Computer Science in a few mid-tier NITs depending upon the specific college and the course availability

READ MORE...

Do you have a question? Ask us.

  • Typical response between 24-48 hours

  • Get personalized response

  • Free of Cost

  • Access to community

Recent Articles

Recent News

Subscribe to CollegeDekho News

By proceeding ahead you expressly agree to the CollegeDekho terms of use and privacy policy

Top 10 Engineering Colleges in India

View All
Top