CBSE Class 9 Science Notes Chapter 4 Structure of the Atom
In this science note, we’ll be covering science revision notes for Class 9 Chemistry Chapter 4 Notes. This is very important for class 9 students who wish to learn more about the structure of the atom. An atom is the smallest unit of a substance that preserves all of an element’s chemical characteristics. Molecules are created by combining atoms, which then join to form solids, liquids, or gases.
According to the structure of an atom class 9 notes, an atom has two regions: a nucleus that forms the centre of the atom and includes neutrons and protons, and an outside area that keeps the electron in its orbit around the nucleus. Neutrons have a negative charge equivalent to a proton’s positive charge.
This science revision note introduces the constituents of a nucleus, isotopes of elements, atomic number, mass number, and nuclear reactions are discussed in the online revision notes for this chapter. Students will be able to use free online notes, which are only available at w3wiki.
- What is an Atom? Definition, Structure, Parts
- Composition of an Atom
- Charged Particles in Matter
- Discovery of Electrons
- What is a Proton? Definition, Discovery, Characteristics
- Neutron – Discovery, Definition, Characteristics, Applications
- Thomson’s Atomic Model
- Rutherford’s Alpha Scattering Experiment
- Atomic Nucleus – Definition, Structure, Discovery, Characteristics
- Rutherford’s Atomic Model
- Drawbacks of Rutherford’s Atomic Model
- How did Neil Bohr explained the Stability of Atom?
- Bohr’s Model of an Atom
- Atomic Number and Mass Number
- Relation Between Mass Number and Atomic Number
- Arrangement of Electrons in the Atoms
- Electronic Configuration of Elements
- Potassium and Calcium – Atomic Structure, Chemical Properties, Uses
- Valence Electrons
- Noble Gas
- What is meant by Chemical Combination?
- Valency and Valence Electrons: Definition, Examples, and Relation
- Difference between Electrovalency and Covalency
- What are Isotopes?
- Why do all the Isotopes of an Element have similar Chemical Properties?
- Why Isotopes have different Physical Properties?
- What is Fractional Atomic Mass?
- Radioactive Isotopes – Definition, Properties, Uses
- What are Isotopes?
CBSE Class 9 Science Notes 2023-2024
CBSE Class 9 Science Notes for the academic year 2023-2024 serve as a crucial foundation for students’ further education. To excel in exams, it is critical to fully comprehend each topic while also thoroughly revising the subject matter. As Class 9 is a crucial period for students, w3wiki provides precisely crafted revision notes to help students be productive and well-prepared for their CBSE Class 9 Science Exam. The Class 9 science notes provide information on all of the relevant formulas, graphs, and equations, presented in an easy-to-understand language and manner.
CBSE Class 9 Science chapter notes will help students secure good marks as well as an understanding of the fundamental concepts of Physics, Chemistry, and Biology. Hence, these chapter-wise notes provided by w3wiki gave a crisp and clear explanation of all the important topics mentioned in the updated CBSE Class 9 Science Syllabus. All required formulas, graphs, and equations are provided in the most concise manner possible for easier understanding.
Check these CBSE Notes to learn and revise all the important concepts and their explanations for each topic covered in all chapters quickly. Furthermore, the CBSE Class 9 notes accessible on our website primarily align with the directives of the CBSE and NCERT syllabus. These notes help students as revision notes for the coming board examination.
Table of Content
- Chapter 1 – Matter In Our Surroundings
- Chapter 2 – Is Matter around us Pure
- Chapter 3 – Atoms and Molecules
- Chapter 4 – Structure of the Atom
- Chapter 5 – The Fundamental Unit of Life
- Chapter 6 – Tissues
- Chapter 7 – Diversity in Living Organisms
- Chapter 8 – Motion
- Chapter 9 – Force and Laws of Motion
- Chapter 10 – Gravitation
- Chapter 11 – Work and Energy
- Chapter 12 – Sound
- Chapter 13 – Why do we fall ill?
- Chapter 14 – Natural Resources
- Chapter 15 – Improvement in Food Resources