John Dalton was a famous chemist born in Eaglesfield, England, on September 6, 1766. Dalton is known for his teachings of James Prescott Joule, atomic theory, and Dalton's law Partial Pressures. Dalton has done much to contribute to the vast world of chemistry as a whole. Dalton is best known for his contributions to modern atomic theory. Born in 1766, John Dalton faced many obstacles while studying chemistry. Although they faced many obstacles, Dalton still managed to become one of the best-known chemists of all time. Before John Dalton, most people did not understand the composition of an element and why it could be held together. But Dalton invented modern atomic theory, explaining the basis of atoms. And also opening many doors to unlimited amounts of research into the atom. The idea that all matter is made up of small particles dates back to the 5th century, when philosophers such as Leucippus and Democritus studied these particles. During this time, atoms were thought to be too small to see, immutable, and indestructible. They came to the conclusion that atoms were solid and had no internal structure. These discoveries were the building blocks that Dalton used to base his modern atomic theory. Without these philosophers Dalton might not have had an interest in the atom. Although this idea has existed for centuries, ideas against the atomic theory have existed for just as long. The philosopher Aristotle opposed the existence of atoms all together. Roman Catholic theologians during the Middle Ages in Europe also supported Aristotle's argument. Overall, atomic theory has been an ongoing topic for many centuries and is still being tested today. Then, in 1808, John Dalton came… halfway through the document… to arc so many different theories and laws. to test the consistency of the atom. Before Dalton, philosophers didn't even know that atoms could be seen. Thanks to John Dalton's discoveries we have been allowed to better understand the atom and all the crucial elements that combine to make it up. With this knowledge we were able to understand the difference between a liquid, a solid and a gas. If we have only recently been able to understand all this new information, we cannot say what the future might hold for atomic research. In conclusion, John Dalton is such an important figure in the world of chemistry. Without him we wouldn't be where we are today. And scientists have not been able to study what they have and are studying in our society today. Scientists around the world are fortunate to be able to further study the same elements that John Dalton studied so long ago