## NCERT Books for Class 9 Science - Structure of The Atom - Free PDF Download

NCERT Books for Class 9 Science Chapter 4

## 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.

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.