Class 9 Science Structure of Atom

Structure of Atoms

Structure of Atoms : Do you know how an Atom look like? What are the different elements or parts of an Atom? Well No one knows how an Atom look like. So in this chapter of class 9 science ” The Structure of the Atom” we will know all about the Atoms.

After reading thoroughly the PDF Notes of Structure of the atom, you will able to distinguish the Atoms and its different parts like – Protons, Neutrons, Electrons etc. This chapter includes more on the topics like :- Atomic Structure, Atomic Mass, Atomic Number, Isotopes and Isobars etc.

Class 9 science Chapter 4 Structure of the Atoms PDF Notes is given below :

Chapter 4 Structure of the Atoms

The Atom is a smallest particle that can not be destroyed or break down further. Also an atoms does not change with the chemical reaction. All atoms have an identical chemical properties, Atomic Number, Atomic mass. But Atoms of different elements have different Chemical properties, Atomic number and Atomic Masses.

This Chapter covers the following topics:

Discovery of electrons, protons and neutrons
Thomson’s atomic model
Rutherford’s atomic model
Bohr’s atomic model
Quantum mechanical model of the atom
Atomic number, mass number and isotopes
Electronic configuration of atoms
It aims to explain the structure of atoms, including the relative locations and properties of the electrons, protons and neutrons that make up atoms, and how these subatomic particles interact. Additionally, it explains the different models of the atom that have been proposed throughout history, and how they have helped scientists understand the nature of atoms

Main topics in The structure of atoms

The main topics of Class 9 Science Structure of Atoms chapter are:

  1. Discovery of electrons, protons, and neutrons
  2. Thomson’s atomic model
  3. Rutherford’s atomic model
  4. Bohr’s atomic model
  5. Quantum mechanical model of the atom
  6. Atomic number, mass number and isotopes
  7. Electronic configuration of atoms
  8. Atomic and ionic radii
  9. Valency
  10. Chemical bonding
  11. Metallic and covalent bonding
  12. Hydrogen bonding
  13. Van der Waals forces

This chapter helps students to understand the structure and properties of atoms, the subatomic particles that make up atoms, and how they interact with each other. It also covers the different models of the atom that have been proposed throughout history and how they have helped scientists understand the nature of atoms. Finally, it covers chemical bonding and its importance in the formation of compounds and molecule

After reading this chapter, you can go through the next chapter of class 9 Science :- Fundamental Unit of Life : Cell

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