Question

in which year jhon dalton postulated his atomic theory?

Answer 1

In an article he wrote for the Manchester Literary and Philosophical Society in 1803, Dalton created the first chart of atomic weights. Seeking to expand on his theory, he readdressed the subject of atomic weight in his book A New System of Chemical Philosophy, published 1808.

Answer 2

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Dalton Put his Theory of Matter in $<b>1808$