Atom Time Line

  • May 2020
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HYPERLINK "http://wind.cc.whecn.edu/~mechalke/chapter5/Chapter5.htm" INCLUDEPICTURE "http://www.school-forchampions.com/science/images/atom-sodium_shells.gif" \* MERGEFORMATINET HYPERLINK "http://www.windows.ucar.edu/tour/link=/cool_stuff/images/electron_cloud_jpg_image.html"

5th Century B.C. ____________ all matter is composed of indivisible particles called ______

1803

1897

1908-1913

_________

_________

Billiard Ball Model the atom is a small solid

Plum Pudding the atom is mostly ______space with Model the atom has a dense positively charged center positive and surrounded by __________ negative ________ parts

_________

_____________ Solar System Model

1920+

____________ Electron Cloud Model is a dense center composed of _________ and neutrons surrounded by electrons in a ___________

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