John Dalton

1. John Dalton Tanpreet and Manvir

2. Personal Story • Born September 6, 1766 – died July 27, 1844 • Gave lectures on natural philosophy at the age of 12 • Made principal within 4 years • His brother and him were born color blind • This led him to research color-blindness, which is officially known as Daltonism

3. Idea of the Atom Atomic Theory • Matter is composed of small particles called atoms, cannot be broken into smaller particles, created or destroyed • Atoms of any given element are all identical to each other and different form the atoms of other elements • Atoms of different elements combine in specific ratios to form compounds • In a chemical reaction, atoms are separated, rearranged, and recombined to form new compounds

4. Experiments/ Areas of Study • Studied weather, atmospheric pressure and meteorology • Daltons Law of Partial Pressures • Discovery of air and its components • Performed numerous experiments of mixtures of gases • Daltonism

5. Major Scientific Contribution • Atomic Theory • All matter is composed of extremely small particles called atoms, which cannot be broken into smaller particles, created, or destroyed. • The atoms of any given element are identical to each other and different from the atoms of other elements. • Atoms of different elements combine in specific ratios to form compounds. • In a chemical reaction, atoms are separated, rearranged, and recombined to form new compounds.

6. Bibliography • http://www.colblindor.com/2006/04/09/daltonism-named-after-john-dalton • http://weather.about.com/od/weatherinstruments/ss/meteorologists.htm • http://www.biography.com/people/john-dalton-9265201 • http://www.humantouchofchemistry.com/john-dalton.htm • http://antoine.frostburg.edu/chem/senese/101/atoms/dalton.shtml