CHAPTER 12
Atoms
CHAPTER AT A GLANCE
Dalton’s Atomic Theory
All elements are consisting of very small invisible particles called atoms. Atoms of same elements are exactly same and atoms of different elements are different.
Thomson’s Atomic Model
Every atom is uniformly positive charged sphere of radius of the order of 
, 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
- It could not explain the origin of spectral series of hydrogen ...
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