-
348
Asistotle
He stated that all substances are made up of 4 elements
1) Fire
2) Air
3) Water
4) Earth -
400
Democritus
He proposed to the "Democritus" element.He was a simple man .He studied about atoms. -
Jhon Dalton
-
J.J Thompson
-
Robert Millikan
-
Ernest Ruthford
-
Neils Bhor
-
Sir James Chadwick
