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NCERT Books for Class 9 Science Chapter 4

Last updated date: 13th Jul 2024
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NCERT Books for Class 9 Science - Structure of The Atom - Free PDF Download

Free NCERT Books download for Class 9 Science Chapter 4 - Structure of The Atom on Vedantu. Students can also download the NCERT Book Solutions in PDF for Class 9 Science Chapter 4 - Structure of The Atom. Register for Science tuition to clear your doubts and score more in your exams. Download NCERT Solution for Class 9 Maths to help you to revise the complete syllabus and score more marks in your examinations.

Ques: How to download Class 9 Science Chapter 4 NCERT Book for CBSE?

Ans: Students can download it from Vedantu. On this page, Students can download Class 9 Science Chapter-4 PDF Solutions of the Book.

The NCERT solution can be considered the best as the language is very simple and prepared by the experts having the subject knowledge in depth. The solutions are curated keeping in mind that students will learn the right format while answering the questions.  The concepts approach is the best in the solutions and students can be confident while preparing for the exams.

Students need not go in search of sources to understand the concept of the chapter. The NCERT solutions have all the explanations and the answers in an organized way. Going through and preparing through the solutions students can excel in the topic.

Chapter 4 Science Class 9 mainly comprises the discovery and structure of an atom. Moreover, students will know more in detail about the scientists, their developments of various models and theories.

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NCERT Books for Class 9 Science Chapter 4
Structure of the Atom in One Shot | CBSE Class 9 Science Chapter 4 NCERT Solutions | Vedantu
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More about the chapter- Structure of an Atom.

This chapter will teach the students about the basic terms which are involved in the study of minute particles, what is the atom? atomic number, atomic mass, neutrons, valency and so on and also about the different atomic models and their features. This also involves the study of charged particles in matter and the basic structure of an atom. 


Some of the models and the limitations in the chapter.

  1. Thomson’s Model of an atom.

  2.  Rutherford’s Model of an atom.

  3. Bohr’s Model of an atom

Along with this model and the limitations, students will also learn about shells and the orbitals and know about the scientist who has contributed immensely to the study of atoms. The students will also learn about the isotopes and the and isobars.


You have seen that there are so many topics and to score well there is a need for a regular strategy and a consistent study plan.


Let us see below some of the effective preparation tips which can be helpful for an easy study.

Each student will have a different way to learn and grasp things but there are some general methods if implemented the preparation will be easy and stress-free.


Time table-Make a proper timetable with the content and syllabus. Most importantly making just a timetable will not be enough but you have to follow it consistently. You can also specify the topics for each day to complete.


Allot a time a place-Once you have prepared the timetable to designate a place and also allot a specific time. When you do things every day at the same time and place there will be punctuality and discipline.


Weakness and strengths- You should know your strengths and weaknesses. Know the difficult and the easy chapters so that you can devote the time accordingly.


Revision- As you proceed with the chapters it is very important to revise the previous chapters which you have studied. Spare 10 to 15 minutes before you start the new sessions.


Preparation of notes- Organized notes will always be helpful especially during the exams. This will give you a review of all the syllabus in a short duration. Your notes should have all the key points and the important terminologies. You can also highlight the sections with different colours to make them prominent so that it becomes easy for you to search.


These tips are very simple but if followed, will make your preparation smooth and stress-free. You can try for a few days and see the changes for yourself.


The important  Features of NCERT Solutions for Class 9 Science Chapter 4 – Structure of The Atom

  1. The solutions help the students to prepare the syllabus without any stress.

  2. All the solutions are well-organized and prepared by experts.

  3. The calculations and the electronic configuration are explained in detail so the understanding is very simple and in easy steps.

  4. Usage of tables for comparison questions has been systematically presented.

  5. Numericals are explained in easy steps.

  6. Pointers are used so that it becomes easy for students to have a glance.

FAQs on NCERT Books for Class 9 Science Chapter 4

1. What are the concepts in the chapter?

This chapter will teach the students about the discovery of electrons and protons. Students will learn about the Theory by J.J. Thomson that electrons are in the positive sphere, the discovery of the atomic nucleus which was by Rutherford’s experiment of the scattering of the alpha particle. The distribution of electrons is explained by Neil Bohr and many more topics. This Chapter briefs about atoms of different elements, representation of elements through the mass number and atomic mass and the basic constituents of an atom. 

2. What are the topics students will learn from this chapter?

The topics that the students learn from this chapter are 

  • Charged particles in matter

  • The structure of an atom

  • Thomson’s model of an atom

  • Rutherford’s model of an atom

  • Bohr’s model of an atom

  • Neutrons

  • How are electrons distributed in different orbits(shells)? 

  • Atomic number and mass number

  • Valency, Isotopes, Isobars, and Atomic number. 

These topics are very well explained thoroughly in NCERT solutions. Students can refer to these and learn quickly. The solutions can be the best help in preparing the notes also.

3. How many exercises are there in the chapter?

There are a total of 9 exercises and 35 questions in total. All these are systematically given in the NCERT solutions. The practice of all these thoroughly will help the students to be familiar with all the variety of questions as these contain, long, short, very short and the MCQs. This will teach the students to answer according to the question and the marking scheme. Knowing the chapter and answering the questions is different and has to be practised very thoroughly.

4. Can the NCERT solutions chapter 4 be found online?

Yes, NCERT solutions can be found online by visiting Vedantu’s website as these are prepared to keep it in mind to be easy for students. The solutions are very simply explained so that the students grasp the conceptual knowledge of the chapter. These solutions are in a systematic order so students need not waste their time in searching for the answers. At the same time can be utilized in learning and understanding the answers. NCERT solutions are the best guide for systematic exam preparation. They are available for free at Vedantu.

5. Will it be enough to study through NCERT solutions only?

If students thoroughly prepare from NCERT solutions it will be enough and they can answer the questions well in the exam. The solutions are as per the textbook and students need not worry or get confused about missing out on any topics. All the topics are well organized and the minute things have been taken care of. Students can confidently study from the NCERT solutions without any fear. The answers for each question are well-formatted and students will learn the right way of answering through the solutions.