Atomic Theory Timeline by Margaret Tucker https://padlet.com/tuckermargareta/7n0dp8cxgbtp en-us 2018-10-08 14:08:54 UTC 2018-10-08 14:42:39 UTC hello@padlet.com Democritus tuckermargareta https://padlet.com/tuckermargareta/7n0dp8cxgbtp/wish/290312001 -380 B.C
-Greece
-He developed the concept of the atom. He believed everything was made up of indestructible, microscopic atoms. 
]]> 2018-10-08 14:14:14 UTC https://padlet.com/tuckermargareta/7n0dp8cxgbtp/wish/290312001 Dimitri Mendeleev tuckermargareta https://padlet.com/tuckermargareta/7n0dp8cxgbtp/wish/290314280 -1863
-Russia
-He formulated the Periodic Law, created a simpler version of the modern Periodic Table and used it to correct the properties of some already discovered elements.
 
]]> 2018-10-08 14:18:34 UTC https://padlet.com/tuckermargareta/7n0dp8cxgbtp/wish/290314280 Ernest Rutherford tuckermargareta https://padlet.com/tuckermargareta/7n0dp8cxgbtp/wish/290318227 -1911
-Britain
- He discovered atoms have a small charged nucleus, surrounded by empty space, and are encircled by tiny electrons.


]]> 2018-10-08 14:25:34 UTC https://padlet.com/tuckermargareta/7n0dp8cxgbtp/wish/290318227 Erwin Schrodinger tuckermargareta https://padlet.com/tuckermargareta/7n0dp8cxgbtp/wish/290322008 -1926
-Austria
- He used mathematical equations to describe the likelihood of finding an electron in a certain position



]]> 2018-10-08 14:31:30 UTC https://padlet.com/tuckermargareta/7n0dp8cxgbtp/wish/290322008 John Dalton tuckermargareta https://padlet.com/tuckermargareta/7n0dp8cxgbtp/wish/290324116 -1803
- England
-He believed all matter is made of invisible, indestructible atoms. Also, that compounds are formed by a combination of 2+ different kinds of atoms. ]]> 2018-10-08 14:35:28 UTC https://padlet.com/tuckermargareta/7n0dp8cxgbtp/wish/290324116 Joseph Thomson tuckermargareta https://padlet.com/tuckermargareta/7n0dp8cxgbtp/wish/290325515 -1897
-Britain 
- Discovered the electron 

]]> 2018-10-08 14:38:33 UTC https://padlet.com/tuckermargareta/7n0dp8cxgbtp/wish/290325515 Niels Bohr tuckermargareta https://padlet.com/tuckermargareta/7n0dp8cxgbtp/wish/290326530 -1913
- Copenhagen
- the hydrogen atom based on quantum theory that energy is transferred only in certain well defined quantities. Electrons should move around the nucleus but only in prescribed orbits. When jumping from one orbit to another with lower energy, a light quantum is emitted.]]> 2018-10-08 14:40:50 UTC https://padlet.com/tuckermargareta/7n0dp8cxgbtp/wish/290326530