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who is the British chemist theorized the basic theory:all matter whether element, compound,or mixture ,is composed of small particles called atom​

Sagot :

Answer:

John Dalton

John Dalton, (born September 5 or 6, 1766, Eaglesfield, Cumberland, England—died July 27, 1844, Manchester), English meteorologist and chemist, a pioneer in the development of modern atomic theory.