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mar 25, 1803 - He studied chemical reaction and made observations and measurements on the way . He was able to determine the mass ratio of the elements involved in those reactions

Description:

Dalton Atomic Theory

Added to timeline:

Jamiyah Polite & Anyliah Middleton

13 Oct 2017

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711

Date:

mar 25, 1803

Now

~ 223 years ago

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