CBSE Notes for Structure of the Atom Class 9 Extra Questions
- There are three fundamental particles of an atom. The proton, electron and neutron.
- The Electron was discovered by J.J. Thomson by conducting a cathode ray experiment.
- Proton was discovered by Ernest Goldstein by the Canal Rays experiment.
- Neutron was discovered by J. Chadwick. Please refer Structure of the Atom Class 9 Extra Questions for more information.
CBSE Revision Notes 