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NCERT Solutions for Class 9 Science Chapter 3

NCERT Solutions for Class 9 Science Chapter 3 - Atoms and Molecules

Vedantu.com - No.1 online tutoring company in India provides you the Free PDF download of NCERT Solutions for Class 9 Science (Chemistry) Chapter 3 - Atoms and Molecules solved by Expert Teachers as per NCERT (CBSE) Book guidelines. All Chapter 3 - Atoms and Molecules Exercise Questions with Solutions to help you to revise complete Syllabus and Score More marks. Register Online for Class 9 Science tuition on Vedantu.com to score more marks in your examination. Vedantu is a platform that provides free CBSE Solutions (NCERT) and other study materials for students. Maths Students who are looking for the better solutions ,they can download Class 9 Maths NCERT Solutions to help you to revise complete syllabus and score more marks in your examinations.


NCERT Solutions for Class 9 Science Chapter 3 Atoms and Molecules part-1
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FAQ (Frequently Asked Questions)

1. Why are topics and sub-topics included in the Class 9 Science Chapter 3 textbook?

A. Class 9 Science Chapter 3 titled Atoms and Molecules NCERT Solutions have been explained by highly experienced Science teachers and subject matter experts. We at Vedantu strive to provide the best quality solutions for the questions given in Class 9 Science textbook as per CBSE Board guidelines from the latest NCERT book for Class 9 Science. 


However, the topics and sub-topics in Chapter 3 Atoms and Molecules are given below. Take a look.

  • Ex 3.1 - Laws of Chemical Combination

  • Ex 3.1.1 - Law of Conservation of Mass

  • Ex 3.1.2 - Law of Constant Proportions

  • Ex 3.2 - What is an Atom?

  • Ex 3.2.1 - What are the Modern Day Symbols of Atoms of Different Elements?

  • Ex 3.2.2 - Atomic Mass

  • Ex 3.2.3 - How do Atoms Exist?

  • Ex 3.3 - What is a Molecule?

  • Ex 3.3.1 - Molecules of Elements

  • Ex 3.3.2 - Molecules of Compounds

  • Ex 3.3.3 - What is an Ion?

  • Ex 3.4 - Writing Chemical Formulae

  • Ex 3.4.1 - Formulae of Simple Compounds

  • Ex 3.5 - Molecular Mass and Mole Concept

  • Ex 3.5.1 - Molecular Mass

  • Ex 3.5.2 - Formula Unit Mass

  • Ex 3.5.3 - Mole Concept

2. How many questions are there in all the exercises in the Class 9 Science Chapter 3 NCERT textbook?

A. There are a total of six exercises in the Class 9 Science Chapter 3 NCERT textbook with a variety of questions. Take a look below

  • EXERCISE 3.1 - 4 Questions 

  • EXERCISE 3.2 - 2 Questions 

  • EXERCISE 3.3 - 4 Questions 

  • EXERCISE 3.4 - 2 Questions 

  • EXERCISE 3.5 - 2 Questions 

  • EXERCISE 3.6 - 11 Questions

3. Explain Dalton’s Atomic Theory.

A. According to Dalton’s atomic theory, all matter, be it an element, a compound or a mixture is composed of small particles called atoms. Below are the postulates of Dalton’s atomic theory provided in tabulated form. Take a look.

  • All the Matters are made up of extremely small indivisible particles called atoms that can neither be created nor destroyed.

  • Atoms which are made of the same substance are also identical in all aspects. They possess the same size, shape, mass, chemical properties etc.

  • Atoms which are made of different substances are different in all aspects. They possess different size, shape, mass etc.

  • Atoms are the smallest particle that takes part in a chemical reaction.

  • Atoms of different elements combine with each other in a simple whole-number ratio to form compounds.

  • The relative number and kinds of atoms are constant in a given compound.

4. What are the benefits of choosing Vedantu’s NCERT Solutions for Class 9 Science Chapter 3?

A. Vedantu’s NCERT Solutions for Class 9 Science Chapter 3 have been prepared with an aim to boost a student’s learning capabilities. These solutions have been designed in such a way that they provide several advantages to all the Class 9 students who opt for these study materials. Vedantu’s Class 9 Science NCERT solutions will undoubtedly help the students in practising and revising the different topics right at the comfort of their homes. Students can also access these solutions from anywhere if they have a smart device along with a stable internet connection. With the help of our NCERT solutions, Class 9 students can further improvise their learning experience by solving all the questions more accurately and efficiently. The NCERT solutions provided by us are accurate as these are solved by the experienced subject matter experts from the relevant field.

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