1. JOHN DALTON AN ENGLISH CHEMIST By: Natasha Holder

2. DALTON WAS BORN IN 1766 INTO A QUAKER FAMILY IN EAGLES FIELD, ENGLAND. HE WAS AN AMAZING CHEMIST AND WAS KNOWN FOR THINGS FROM THE STUDY OF COLOR BLINDNESS AND METEOROLOGY TO ATOMS AND ELEMENTS. HE DIED IN 1844, MANCHESTER UK. AS STATED IN AN ARTICLE ON HTTP://WWW.CHEMHERITAGE.ORG/DI SCOVER/ONLINE- RESOURCES/CHEMISTRY-IN- HISTORY/THEMES/THE-PATH-TO-THE- PERIODIC-TABLE/DALTON.ASPX HTTP://WWW.CHEMHERITAGE.ORG/DI SCOVER/ONLINE- RESOURCES/CHEMISTRY-IN- HISTORY/THEMES/THE-PATH-TO-THE- PERIODIC-TABLE/DALTON.ASPX Birth & death dates

3. ONE OF DALTONS FIRST CONTRIBUTION TO THE ATOM Daltons fascination with gases slowly led him to believe that every form of matter, whether it be a solid, liquid, or gas is made up of small individual particles. He soon borrowed the term “atomos” or “atoms” to label these particles as stated in, http://www.biography.com/people/john -dalton-9265201#atomic-theory. In an article that Dalton had wrote for the Manchester literary and philosophical society in 1803, Dalton had made the first atomic weights. http://www.biography.com/people/john -dalton-9265201#atomic-theory

4. A NEW SYSTEM OF CHEMICAL PHILOSOPHY Wanting to expand on his theory he readdressed atomic weight in a book that he published in 1808 called a new system of chemical philosophy. In this book, Dalton introduced his belief that atoms of different elements could be universally distinguished based on their varying atomic weights. In doing this, Dalton was the first scientist who explained the behavior of atoms in terms of the measurement of weight. In his book, Dalton wrote about his experiments proving that atoms consistently combine in simpler ratios. This meant that, with the exception of water molecules, molecules of an element are always made up of the same proportions. As found on http://www.biography.com/people/john-dalton- 9265201#atomic-theory. http://www.biography.com/people/john-dalton- 9265201#atomic-theory

5. MORE ABOUT HIS BOOK In 1810, Dalton published an appendix to his book a new system of chemical philosophy. In it he elaborated on some of the details of his theory that the atoms within a given element are all exactly the same size and weight, while the atoms of different elements look and are different from one other. Dalton also eventually composed a table listing the atomic weights of all known elements. Also stated in http://www.biography.com/people/john-dalton-9265201#later-life. http://www.biography.com/people/john-dalton-9265201#later-life

6. DALTON’S ATOMIC THEORY 1.All matter is made up of atoms. Atoms are indivisible and indestructible. 2.All atoms in a given element are identical in mass and properties. 3.Compounds are formed by a combination of two or more different kinds of atoms. 4.A chemical reaction is a rearrangement of atoms. As stated in http://www.iun.edu/~cpanhd/C101webnotes/c omposition/dalton.html

7. AWARDS One award that John Dalton received was the ‘Royal award’ or the ‘Queen’s award.’ It is given to two people a year who stand out in the field of science, and he was awarded this medal for his development in the atomic theory. Dalton also had a few scholarships named after him for those who excelled in science. As stated in, http://johndaltonpd7.weebly.com/awards- and-recognition.html http://johndaltonpd7.weebly.com/awards- and-recognition.html