John Dalton and Atomic Theory Outline and Sources free essay sample

This is the general path to his discoveries. However, no one knows specifically how he reached most of his conclusions about atoms. II. Work on the atom and its contribution to the modern atomic model A. Lavoisier’s Law influenced Dalton’s assertion that atoms cannot be created, destroyed, or subdivided. B. Proust’s Law of Definite Proportions led Dalton to his Law of Multiple Proportions C. He was trying to explain why water absorbs different gases in different proportions. D. Contributions 1. All matter consists of tiny particles, atoms. 2. Atoms cannot be created, destroyed, separated into smaller parts or transformed into another element. 3. All atoms of the same element have identical weights, while atoms of different elements have different weights. 4. When elements react, their atoms combine in simple, whole-number ratios. 5. When elements react, their atoms sometimes combine in more than one simple, whole-number ratio. 6. When atoms combine in only one ratio, they are combining in a 1:1 ratio. We will write a custom essay sample on John Dalton and Atomic Theory Outline and Sources or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page III. Contributions which were eventually disproven and thus are not part of the modern model A. The idea that atoms that combine in only one ratio do so in a 1:1 ratio not only led him to wrong conclusions, but also caused his theory to be rejected for many years. B. Another mistaken idea was that atoms cannot be separated into smaller parts or transformed into another element. C. The assertion that all atoms of the same element have identical weights, while atoms of different elements have different weights is inaccurate. IV. Conclusion A. His work was important and foundational to modern atomic model. Sources [1] John Dalton (British Scientist): Atomic Theory. Encyclopedia Britannica Online. Encyclopedia Britannica, n. d. Web. 5 Feb. 2013. . [2] Lefers, Mark, and Holmgren Lab. Northwestern University/Morimoto Laboratory-Definitions. Online Posting. Morimoto Laboratory. Northwestern University, 26 July 2004. Web. 5 Feb. 2013. . [3] John Dalton Biography. Bio. com. AE Networks Television, n. d. Web. 5 Feb. 2013. . [4] Senese, Fred. Foundations of Daltons Atomic Theory. Gener al Chemistry Online: Companion Notes: Atoms Ions: Daltons Atomic Theory: Daltons Postulates. N. p. , 25 July 2005. Web. 5 Feb. 2013. .