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. 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. A&E Networks Television, n. d. Web. 5 Feb. 2013. . [4] Senese, Fred. “Foundations of Dalton’s Atomic Theory. ” General Chemistry Online: Companion Notes: Atoms & Ions: Dalton’s Atomic Theory: Dalton’s Postulates. N. p. , 25 July 2005. Web. 5 Feb. 2013. .
The Essay on John Dalton 2 Atomic Theory
John Dalton (1766 - 1844) Around September 2, 1766 John Dalton was born. He was born in Eagles field, England. Dalton was most known for the development of the modern atomic theory. Dalton was taught at his early ages of learning by his father and a Quaker teacher whom in 1778 Dalton would replace him after he retired. He quit that job and left his village to work with his cousin in Kendal, but he ...
