CBSE Class 9 Science Chapter 4 - Structure of The Atom Class 9 Notes

Structure of The Atom CBSE Class 9 Revision Notes

Structure of The Atom Class 9 Notes- Firstly, the chapter tells about atoms. Furthermore, the chapter tells about protons and electrons. In addition, the chapter also defines how Rutherford discovers the atomic nucleus. Moreover, the chapter also Bohr’s model of the atom is also discussed. Besides, the discovery of shells and how their names are designated in an atom. Most noteworthy, the valency of an atom is also described in this chapter.

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Sub-topics covered under Structure of The Atom

Introduction: Structure of Atom – Firstly, this topic tells what are an atom, its structure, properties, and components.
Atomic Number – Secondly, the topic describes atomic numbers.
Bohr’s Model of Atom – The topic overviews Bohr’s model of an atom.
Charged Particles in Matter – Moreover, this highlights the charges in a particle of an atom.
Isobars – The topic defines what are isobars.
Isotopes – Furthermore, this topic teaches what isotopes are.
Mass Number – This topic tells about the mass number of atoms.
Neutrons – The topic describes neutrons and their properties.
Rutherford’s Model of an Atom – Moreover, this overviews Rutherford’s model of an atom and its components.
Thomson’s Model of an Atom – The topic teaches about Thomson’s model of an atom and its components.
Valency – Furthermore, this defines the valency of an atom.
How are Electrons Distributed in Different Orbits (Shells)? – This topic highlights the electrons’ distribution in a different orbit.
Sub-Atomic Particles – In addition, the topic tells about sub-atomic particles.
Atomic Models – This topic highlights the different atomic models.
Shapes of Atomic Orbitals – The topic overviews the shapes of atomic orbitals.
Energies of Orbitals – Also, this topic describes the energies of orbitals.
Quantum Numbers – The topic defines quantum numbers.
Development Leading to Bohr’s Model of Atom – This topic highlights the development in Bohr’s model of an atom.
Emission and Absorption Spectra – The topic tells atoms emission and absorption spectra.
Towards Quantum Mechanical Model of Atom – Lastly, this topic talks about the quantum mechanics model of an atom.