1.

How did the idea of sub-atomic particles evolve?

Answer»
  • According to Dalton, atom is indivisible. 
  • But Michael Faraday’s experiments on electrolysis proved that atoms were acquiring negative charge during electrolysis. 
  • This is contradiction to Dalton’s theory. 
  • This lead to an idea that there must exist some tiny particles in atom which are responsible for atom to behave sometimes as charged particles. 
  • As atom is considered as electrically neutral, it probably had equal number of positive and negative constituents to maintain electrical neutrality.
  • This gave scope to think about sub-atomic particles.


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