Structure of the Atom Class 9 Notes

Structure Of The Atom Class 9 CBSE Notes – Chapter 4

Essentially, the structure of an atom comprises of protons, neutrons and electrons. These basic components provide the mass and charge of the atoms. The nucleus comprises of proton and neutron, with the electron orbiting around that.

The Structure of an Atom:
Over the years, many models of atoms have been put forth based on theories and assumptions. But one of the many significant models includes the Bohr Model, Thomson’s Model and Rutherford’s Model. However, these are quite outdated today. The Bohr-Sommerfeld Theory is the most widely accepted model that explains the atomic structure. In this model, the concept of electrons revolving around orbits are completely scrapped, instead, electrons exist in “energy states.” Please refer  Structure of the Atom Class 9 Notes for more revision notes.