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Development of Atomic Theory

Dalton had a great interest in meteorology and the atmosphere. This led him to the study of gasses and forming the atomic theory. He published a paper explaining that when two different gasses were mixed together they acted independently as if the other one is not present. Dalton, also postulated the law of thermal expansion.

In the year 1803, Dalton was able to submit another paper, “The law of multiple proportions,” which states that elements always combine in whole number ratios. He created the first table of atomic weights, hydrogen being the first one having a mass of 1.

In a way to expand his theory, Dalton published “A new system of chemical philosophy” in the year 1808 which states that atoms of different elements can be distinguished from one another by their varying atomic weights. Thus he became the first scientist to describe atoms behavior in terms of the measurement of weight. He also explained that atoms cannot be created or destroyed. Though Daltons work was welcomed by some people, it received much debate and hype among scientists. However, people began accepting Dalton’s work when more experiments were made on the subject matter in the later years.

Head of the department “Uzbek language and literature” doc. Tavaldieva G.