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Made first vacum pump http://chemistry.about.com/cs/history/a/aa020204a.htm
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Discovers oxygen http://chemistry.about.com/cs/history/a/aa020204a.htm
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Bases of photochemistry was discovered by C.W. Scheele which is the proccess of the chemical reaction in atoms when absorbing light. http://www.chemistryexplained.com/Ru-Sp/Scheele-Carl.html
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Sir Humphry Davy studied salts electroysis in water http://chemistry.about.com/cs/history/a/aa020204a.htm
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Charles Goodyear found that if one would remove the sulpher from rubber then heating the rubber it would keep its elasticity. http://inventors.about.com/od/gstartinventors/a/CharlesGoodyear.htm
http://www.pbs.org/wgbh/theymadeamerica/whomade/images/who_goodyear_image.jpg -
-Matter is made up of indivisible atoms.
-All atoms of an element are identical.
-Atoms are neither created nor destroyed.
-Atoms of different elements have different weights and chemical properties.
-Atoms of different elements combine in simple whole numbers to form compounds.
http://library.thinkquest.org/C006669/data/Chem/atomic/development.html
http://www.chemistryexplained.com/images/chfa_01_img0100.jpg -
Thomson descovered electons in atoms calling them "bodies smaller than atoms" and said they have a very larg charge-to-mass ratio. His design of an atom was of a sphere of positive matter in which electrons are positioned by electrostatic forces. http://www.chemheritage.org/discover/chemistry-in-history/themes/atomic-and-nuclear-structure/thomson.aspx
http://harmonyscienceacademy.web.officelive.com/images/plumpudding.gif -
He studied absorption of radioactivity.
-Alpha radiation - positive charge - absorbed by a few hundredths of a cm or metal foil
-Beta radiation - negative charge - could pass through 100x as much foil before it was absorbed http://library.thinkquest.org/C006669/data/Chem/atomic/development.html
http://library.thinkquest.org/C006669/data/Chem/atomic/development.html -Gamma rays - no charge - could penetrate several cm of lead -
The Bohr model was of a small positively charged atom with electrons circeling it like that of a solar systm. http://en.wikipedia.org/wiki/Bohr_model
http://reich-chemistry.wikispaces.com/file/view/bohr2.png/98110157/bohr2.png
