-
460
Democritus
He told that every matter is made up of tiny partis also called atons. He told some atoms are oily ,pointy and some of them have hooks -
460
Aristotle
He said we could divide matter as muche time we want there is no limit He didn't believen the atomic theory and tHoughton that every thinges was madestablished up of☺ fire ☺,water ☺Earth and ☺ air -
John Dalton
Compounds are formed when atoms of different elements combine in fixed proportions Chemical reactions involves a rearrangement of atoms thereally is no change on atom themselves -
Robert Brown
He saw some pollen grains that were constantly moving in water randomly.This was known as Browin an motion He gave the consept how atom looked like -
Albert Einstein
Albert Einstein theorised that Brownine motion was caused by the water molecules consister knocking the grains . He developed a hypothical mathematical logic to describe it.
