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400
democritus
democritus proposed the atomic theory. he called these small pieces of matter atoms. he was also called the father of moddern science -
Period: 400 to
za great airstotle
airstotle stated that all substances are made of 4 eliments 1. fire 2.water 3. earth 4.air he was born on 385 bc -
Period: to
john dalton za smeart
transformed democritus' ideas on atoms into a moddern atomic number
daletons atomic theory
1) all matter is made of tiny microscopic particals called atoms
2)the atoms of the same eliment are identical those of difforint eliments are