1700+-+1800GS

This picture comes from: [] Name: Isaac Newton DOB- DOD Jan 4th 1643 - March 31st 1727 Country of Origin: England

Sir Issac Newton was a English Philsopher born in January 1643. He is regarded as the most original and influential theorist in the history of science. His most noted contributions were infiniteimal calculus and a new theory of light and color. His most famous discovery is his three theories of motion and gravitational pull. Discovered famously from his experiment with a falling apple. Newton attended Trinity College in Cambridge.

Newton's work is the basis of classical mechanics, so it would be used by Dalton and other chemists to develop atomic theory. Newton's classical mechanics don't take you terribly far in understanding chemistry. You really need quantum mechanics. But quantum mechanics would never have been figured out without building on the work of Newton. Also Newton contributed to the atom by proposing a mechanical universe with a small solid masses in motion. This picture comes from: [] Name: Joseph Black DOB-DOD April 16th 1728 – 6 December 1799 Country of Origin: Scotland

Joseph Black was a Scottish physician born April 16th 1728 in Scotland. He is known for his discoveries of latent heat,and C02. He was a professor of medicine at the University of Michigan. He also served as lecturer in Chemistry.

Joseph Blacks theory of fixed air led to the Phlogiston Theory, which was later accepted as the atomic theory. Clearly proving his immense efforts and contributions toward the atom. This picture comes from: [] Name: Joseph Priestly DOB-DOD 1703-1804 Country of Origin:

Priestley, one of the most important chemists of the later eighteenth century. He was an English radical dissenting minister and chemist. He is best known for being one of the discoverers of oxygen and he also wrote "A history of Electricity" with the help of Benjamin Franklin. In 1774 Priestley explained to the world his discovery of "dephlogisticated air. Priestley had isolated oxygen from air, although he remained firmly convinced of the traditional phlogiston theory of matter until his death.

The work of Priestley, important as it was in its own right, is especially valuable for paving the way for Antoine Lavoisier, the founder of modern chemistry. It was up to Lavoisier to make sense of Priestley's discovery of oxygen, which Priestley regarded as "dephlogisticated air." Due to Priestly's influence and discovery, Lavoisier rejected phlogiston theory in favor of an atomic theory of matter, prompting a major switch over to this theory in the Science World.