Chapter 4 Structure of the NCERT Solutions for Class 9 Science the Atom at INFINITY LEARN gives students answers to all of the questions in the NCERT Class 9 textbook, which follows the CBSE board’s guidelines. This article supplies students with study source material created by a team of specialists with extensive subject understanding. Students who solve NCERT Solutions for Class 9 Science will be able to achieve the highest possible score on the Class 9 CBSE Science Term II exam.
Our professionals at INFINITY LEARN employ language that is proficient and understandable to Class 9 students when preparing NCERT Solutions for Class 9 Science, supporting them in better comprehending the idea. This is founded on a concept-based strategy. These NCERT Solutions have been created with the CBSE’s preferred manner of answering in mind, and the allotment of marks in CBSE Term-II examinations has been taken into account to help students set out their answers correctly and therefore achieve the highest possible marks. The board’s NCERT textbook is created by a panel of experts who take into account the most recent developments in science and technology.
NCERT Exemplar Solutions for Class 9 Science Chapter 4 are also offered.
Class 9 Science Chapter 4 CBSE Notes
NCERT Solutions for Class 9 Science Chapter 4 – Structure of The Atom
NCERT Solutions for Class 9 Science Chapter 4 – Structure of The Atom is categorized under Unit I – Matter – Its nature and behaviour, which fundamentally deals with the physical nature of matter and what makes up the particles that make up matter. The entire unit of matter is worth 23 points, with the Structure of the Atom chapter receiving 10 points. Students should practice utilizing the Science NCERT Solutions for Class 9 in order to achieve the highest possible grade.
This chapter is well-balanced. A thorough understanding of all of the concepts taught in this chapter can help you earn up to ten points just from this chapter. From this chapter, about 2 questions with 5 marks each appear in the CBSE Term II examination and are projected to appear again the following year.
Subtopics addressed in Chapter 4 of Class 9 Science: Structure of The Atom:
| Section | Topic/ Subtopic |
| 4.1 | Charged particles in matter |
| 4.2 | The structure of an atom |
| 4.2.1 | Thomson’s model of an atom |
| 4.2.2 | Rutherford’s model of an atom |
| 4.2.3 | Bohr’s model of an atom |
| 4.2.4 | Neutrons |
| 4.3 | How are electrons distributed in different orbits(shells)? |
| 4.4 | Valency |
| 4.5 | Atomic number and mass number |
| 4.5.1 | Atomic number |
| 4.5.2 | Mass number |
| 4.6 | Isotopes |
| 4.6.1 | Isobars |
Students can use the NCERT Solutions for Class 9 Science Chapter 4 to make quick references to help them understand the above and other difficult concepts. Furthermore, these answers are available as a downloaded PDF that can be examined both online and offline.
Class 9 Science Chapter 4 Number 4 Exercises List 1
- Number 4.1 – Charged particles in matter 2 Question (2 short)
- Number 4.2 – The structure of an atom 4 Question (4 short)
- Number 4.2.4 – Neutrons 2 Question (2 short)
- Number 4.3 – How are electrons distributed
- indifferent orbits(shells)? 2 Question (1 long, 1 short)
- Number 4.4 – Valency 1 Question (1 long)
- Number 4.5 – Atomic number and mass number 2 Question (2 long)
- Number 4.6 – Isotopes 2 Question (1 long, 1 short)
- Exercise Solutions – 19 Question (6 long, 9 short, 4 MCQ)
Chapter 4 – Structure of the Atom NCERT Solutions for Class 9 Science
In this chapter, we learn about J.J. Thomson’s and Goldstein’s contributions to the discovery of electrons and protons, respectively. Electrons are implanted in the positive sphere, according to J.J. Thomson’s idea. Rutherford’s alpha-particle scattering experiment paved the way for the discovery of the atomic nucleus. We also discover how successful Neil Bohr’s model was in explaining how electrons are scattered in various orbits around the nucleus.
This chapter also discusses J. Chadwick’s proposal for the discovery of neutrons in an atom, leading to the conclusion that there are three subatomic particles: protons, neutrons, and electrons. It also clarifies terms like valency, atomic number, and mass number, which are crucial for identifying elements and their behavioural characteristics. Access the NCERT Solutions for Class 9 of this chapter of science to learn more about these ideas.
Overall, it aids us in understanding what distinguishes an atom from atoms of other elements, the concept of atom indivisibility, the representation of elements through mass number and atomic mass, and the basic constituents of an atom.
NCERT Solutions for Class 9 Science Chapter 4 – Structure of the Atom: Main Characteristics
- NCERT Solutions make it possible for pupils to relax while studying for the CBSE Class 9 Term II examination.
- While solving, calculations and electronic configurations were thoroughly described.
- Wherever possible, diagrams have been included to aid visual learning.
- Numerical problems regarding determining the valency of elements have been thoroughly investigated.
- Tables are used in comparison questions to aid learning and comprehension.
- In order to remember at a glance, pointers were employed in the solutions.
NCERT Solutions for Class 9 Science Chapter 4 Frequently Asked Questions
List the topics and subtopics enclosed in NCERT Solutions for Class 9 Science, Chapter 4.
Chapter 4 of NCERT Solutions for Class 9 Science covers the following themes and subtopics:
4.1 Charged particles in matter
4.2 The structure of an atom
4.2.1 Thomson’s model of an atom
4.2.2 Rutherford’s model of an atom
4.2.3 Bohr’s model of an atom
4.2.4 Neutrons
4.3 How are electrons distributed in different orbits(shells)?
4.4 Valency
4.5 Atomic number and mass number
4.5.1 Atomic number
4.5.2 Mass number
4.6 Isotopes
4.6.1 Isobars
In Chapter 4 of NCERT Solutions for Class 9 Science, how many exercises are there?
The exercises existing in Chapter 4 of NCERT Solutions for Class 9 Science are –
Number 4.1 – Charged particles in matter 2 Questions (2 short)
Number 4.2 – The structure of an atom 4 Questions (4 short)
Number 4.2.4 – Neutrons 2 Questions (2 short)
Number 4.3 – How are electrons distributed
Indifferent orbits(shells) – 2 Questions (1 long, 1 short)
Number 4.4 – Valency 1 Question (1 long)
Number 4.5 – Atomic number and mass number 2 Questions (2 long)
Number 4.6 – Isotopes 2 Questions (1 long, 1 short)
Exercise Solutions – 19 Questions (6 long, 9 short, 4 MCQ)
How can I get the NCERT Solutions for Science Fourth chapter for the 9th class online?
INFINITY LEARN has NCERT Solutions for Class 9 Science Chapter 4 available. These solutions have been produced by specialists to assist students with their CBSE Term II test preparation. The solutions include clear explanations in easy-to-understand language to help students gain a better understanding of the concepts. Students can save a lot of time by using the solutions PDF to get the proper answer to each question.
