It is a bit like asking how the alphabet affects written English today. Dalton proposed modern atomic theory and quantified this with atomic weights (relative atomic mass). read more
John Dalton proposed the theory that in simple terms. Elements are made of extremely small particles called atoms. This is the simple term, he has other but this has a bigger effect in the general knowledge of chemistry. read more
John Dalton was the one that brought forword a theory known today as daltons atomic theory it states. Elements are made of extremely small particles called atoms. Atoms of a given element are identical in size, mass, and other properties; atoms of different elements differ in size, mass, and other properties. read more