Period+4+Dalton

How did Dalton come to describe the modern Atomic Theory? How accurate were the points of his Atomic Theory? What work was Dalton known for while working with other scientists studying the behavior of gases?//** media type="custom" key="2252337" On September 6, 1776, John Dalton was born at Eaglesfield near Cumberland, England. Born into a Quaker family, he was the son of Joseph and Deborah Dalton. He had a brother, Jonathan, and a sister, Mary. At the age of 12, [|John Dalton] joined his brother, Jonathan, in building a Quaker School in Kendal. Dalton taught at this school for ten years. He then moved to Manchester and continued to teach. There, Dalton joined the Manchester Literary and Philosophical Society, which let him use their upscale laboratories. He wrote his first paper on color blindness, which was soon called "Daltonism." Dalton wrote about this topic because he was colorblind. His paper was about the problems that he encountered in his daily life. Dalton also presented a series of papers to society entitled //Experimental Essays// on mixed gases. He studied the pressure of steam and other vapors at different temperatures, both in a vacuum and in the air. Dalton also studied the thermal expansion of gases. His essay concluded that the variation of vapor pressure for all liquids is equal. Dalton was an English chemist, meteorologist, and physicist. He was also a math and a philosophy teacher at a "new college" in Manchester. Originally, Dalton wanted to go into law or medicine, but his family didn't want him to. He was chosen to give a course of lectures on natural philosophy in 1804 at the Royal Institution. Some witnesses reported that Dalton wasn't a good lecturer. He was awarded an annual civil pension. During Dalton's time, stoichiometry was just beginning to develop. All together, he is best known for his development of the atomic theory. The atomic theory, according to [|Dalton], means that each chemical element is composed of atoms of a single, unique type. They are both immutable and indestructible. They later can combine to form more complex structures. Studying the atomic theory, he also noticed that it could show why water absorbed different gases in different proportions. He figured it was because of the mass. In 1803, Dalton presented his first list of relative atomic weights for a number of substances. He published this in 1805. However, he did not discuss exactly how he came to these figures. He worked with Thomas Thomson on this idea. The method was then first presented in 1807. Later, in 1808 and 1810, Dalton published his own textbook, //A New System of Chemical Philosophy//. He got the idea from Thomson.
 * //John Dalton was a teacher. What fields of science was he best known for working in?

[|Dalton's] theory was not always correct. He was not a perfect man, so he had many flaws. One flaw was [|Dalton] estimated the atomic weights according to the mass ratios in which they combined. However, Dalton did not realize that with some elements, atoms exist in molecules. He also mistakenly believed that the simplest compound between any two elements is always one atom of each. That means he thought water was HO, not H2O. He forgot about the molecules. A scientist named Avogadro was able to fix this flaw.

[|John Dalton] had five main points to his Atomic Theory. First, Dalton stated that elements are made of tiny particles called atoms. Secondly, all atoms of a given element are identical. Third, the atoms of a given element are different from those of any other element. His fourth point stated that atoms of one element can combine with atoms of other elements to form chemical bonds. Lastly, atoms cannot be created, divided into smaller particles, nor destroyed in the chemical process. Not of all Dalton's points to his Atomic Theory were true, though. Dalton's idea that all atoms of a given element are identical in their physical and chemical properties is not necessarily true. However, his fifth idea that states atoms cannot be created, divided into smaller particles, nor destroyed in the chemical process is true. All in all, Dalton's theory is very important to science, even though it did have a few flaws.

In 1837, [|John Dalton] suffered from a minor stroke and then a second one in 1838. His second stroke left him with a speech impediment. In 1884, Dalton suffered from a third stroke. On July 27, 1884, he fell from his bed and was found dead by his attendant. Dalton was buried in Manchester, in the Ardwick cemetery.