NCERT Solutions for Class 9 Science assist students in resolving any issues quickly and effectively.
These NCERT Solutions help students understand the key concepts covered in the CBSE Class 9 Science curriculum.
To have a thorough comprehension of the concepts, students must complete the exercise questions in the textbook.
While studying many doubts may arise in the minds of the students these solutions will help them resolve these problems. Clearing basics for any subject are very important and thus with these solutions students can build a strong base for their future endeavors.
We also make certain that the NCERT Solutions we supply are tailored to suit a variety of evaluator criteria. This ensures that the responses are extremely relevant and maintain their informational value across courses.
While studying many doubts may arise in the minds of the students these solutions will help them resolve these problems. Clearing basics for any subject are very important and thus with these solutions students can build a strong base for their future endeavors.
We also make certain that the NCERT Solutions we supply are tailored to suit a variety of evaluator criteria. This ensures that the responses are extremely relevant and maintain their informational value across courses.
NCERT Class 9 Science Chapter 4 Solutions
Chapter 4 –Structure of the Atom NCERT Solutions for Class 9 Science (Chemistry).
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Solutions are created with the assistance of qualified teachers with extensive conceptual knowledge and years of expertise. The content is well-structured to make learning and understanding easy for students. The NCERT Solutions have also been updated to reflect the most recent NCERT syllabus.Chapter 4: Structure of the Atom
This chapter is a part of the first unit in chemistry class 9 that is Matter – Its Nature and Behavior.
The entire unit carries 23 marks according to the previous years question papers thus making it one of the most important units in the syllabus.
As a result, it's critical to spend time studying this chapter thoroughly.
- 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 ATOM
- NEUTRONS
- How are Electrons Distributed in Different Orbits (Shells)?
- Valency
- Atomic Number and Mass Number
- ATOMIC NUMBER
- MASS NUMBER
- Isotopes
- Isobars
Students can refer to these solutions in order to solve their confusion about complex questions.
Exercise 4.1
Q1. What are canal rays
A1. Canal rays discovered by E. Goldstein in 1866. These rays are positively charged radiations which consist of positively charged particles of atoms. They are also known as anode rays. They can pass through the perforated cathode and then travel towards another cathode in a gas discharge tube. They led to the discovery of positively charged subatomic particles called protons.
Q2. If an atom contains one electron and one proton, will it carry any charge or not?
A2. The atom will be electrically neutral because the proton is a positively charged particle and the electron is a negatively charged particle their magnitude is equal and hence, net charge in an atom is zero.
Exercise 4.1
Q1. What are canal rays
A1. Canal rays discovered by E. Goldstein in 1866. These rays are positively charged radiations which consist of positively charged particles of atoms. They are also known as anode rays. They can pass through the perforated cathode and then travel towards another cathode in a gas discharge tube. They led to the discovery of positively charged subatomic particles called protons.
Q2. If an atom contains one electron and one proton, will it carry any charge or not?
A2. The atom will be electrically neutral because the proton is a positively charged particle and the electron is a negatively charged particle their magnitude is equal and hence, net charge in an atom is zero.
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About NCERT Class 9 Science Chapter 4 Solutions: Structure of the atom
In this chapter, we learn about J.J.
Thomson's and E.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 different orbits around the nucleus.
This chapter also discusses J.Chadwick's 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 properties. Access the NCERT Solutions for Class 9 of this chapter of Science to learn more about these ideas.
This chapter also discusses J.Chadwick's 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 properties. Access the NCERT Solutions for Class 9 of this chapter of Science to learn more about these ideas.
Why is NCERT Class 9 Science Chapter 4: Structure of the atom a part of the curriculum?
It is a part of the curriculum as It aides us in understanding the fundamental principles of what distinguishes an atom from atoms of other elements, atom indivisibility, element representation through mass number and atomic mass, and the essential constituents of an atom and also to help you with your studies, look into more important NCERT Solutions For Class 9 Science.
Salient features of NCERT Class 9 Science Chapter 4 Solutions: Structure of the atom
- Written by certified teachers and industry specialists in an easy-to-understand language
- Questions from the most recent mandated curriculum are included.
- An in-depth examination of past year's exam questions
- Content was developed in great detail, with all jargons explained.
- Examine other learning resources such as example papers and question papers from past years.
