CBSE NOTES CLASS 12 PHYSICS
CHAPTER 12 ATOMS
Thomson’s atomic model
Every atom is uniformly positive charged sphere of radius of the order of 10-10 m, in which entire mass is uniformly distributed and negative charged electrons are embedded randomly.
The atom as a whole is neutral.
Limitations of Thomson’s atomic model
1. It could not explain the origin of spectral series of hydrogen and other atoms.
2. It could not explain scattering of α–particles in the Rutherford’s experiment.