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101
Democrate (Greeks)
They had discovered that the atoms cannot be divided. -
Dalton's Theory
Dalton thought that atom was a hard sphere. John Dalton says matter is made up as atoms. All the atoms of an element are exactly alike. -
Crooke
In 1861 crooke discovered a green element emissions line in its spectrum. -
JJ Thomson
He had won the nobel prize of his theoritical and experiemental instevigation.