The History Of An Atom by Matthew Davidson https://padlet.com/488807/5c5nvxqe6fjq What is the history of an atom? en-us 2016-10-31 19:23:20 UTC 2016-11-01 20:20:09 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Planets.png The History Of The Atom 488807 https://padlet.com/488807/5c5nvxqe6fjq/wish/134612773 2016-11-01 19:37:14 UTC https://padlet.com/488807/5c5nvxqe6fjq/wish/134612773 Democritus 488807 https://padlet.com/488807/5c5nvxqe6fjq/wish/134613083 Democritus is the known as the first person who ever mentioned anything about an atom. ]]> 2016-11-01 19:38:29 UTC https://padlet.com/488807/5c5nvxqe6fjq/wish/134613083 John Dalton   488807 https://padlet.com/488807/5c5nvxqe6fjq/wish/134614402 John Dalton is created an atomic theory with three rules:
1) All matter is made of atoms and these atoms are indestructible and indivisible. 

2) Atoms of an element are given properties and mass. 

3)Compounds are formed by combining two or more different atoms together .

4) All chemical reactions is just a change of order in atoms.]]> 2016-11-01 19:43:27 UTC https://padlet.com/488807/5c5nvxqe6fjq/wish/134614402 Neils Bohr  488807 https://padlet.com/488807/5c5nvxqe6fjq/wish/134618455 Neils Bohr created the in-placed the modern version of an atom with protons and neutrons on the inter part of the atom and electrons in the orbit. He stated that it was like the solar system.]]> 2016-11-01 20:00:19 UTC https://padlet.com/488807/5c5nvxqe6fjq/wish/134618455 488807 https://padlet.com/488807/5c5nvxqe6fjq/wish/134620004 http://timetoast.com/timelines/83980
this is the url if it does not work]]> 2016-11-01 20:07:45 UTC https://padlet.com/488807/5c5nvxqe6fjq/wish/134620004 Soddy  488807 https://padlet.com/488807/5c5nvxqe6fjq/wish/134620811 Soddy discovered half life and labeled radioactive elements into variables the he called isotopes]]> 2016-11-01 20:11:43 UTC https://padlet.com/488807/5c5nvxqe6fjq/wish/134620811 G.J. Stoney  488807 https://padlet.com/488807/5c5nvxqe6fjq/wish/134621267 Stoney discovered negative particles and called them electrons.]]> 2016-11-01 20:14:13 UTC https://padlet.com/488807/5c5nvxqe6fjq/wish/134621267 Dmitri Mendeleeff 488807 https://padlet.com/488807/5c5nvxqe6fjq/wish/134621862 he created seven grouped that labeled the elements. he also created the periodic law which stated ¨periodic functions of the their atomic weights¨.]]> 2016-11-01 20:17:30 UTC https://padlet.com/488807/5c5nvxqe6fjq/wish/134621862