-
400
Aristotle BC
Aristotle believed in the earth, fire, air, and water. http://www.timetoast.com/timelines/the-atom-timeline
http://hi.fi.tripod.com/timeline/ -
Period: 400 to
timespan
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460
Democritus BC
Democritus believed that if you cut a peice of matter in half then break it in half until it was no longer possible that would be a atom. http://www.timetoast.com/timelines/the-atom-timeline
http://hi.fi.tripod.com/timeline/
http://www.nobeliefs.com/atom.htm
http://www.nobeliefs.com/atom.htm -
Dalton
He formed the atomic theory, which states that all matter is composed of tiny, indestructible particles called atoms that are all alike and have the same atomic weight. http://www.timetoast.com/timelines/the-atom-timeline
http://www.nobeliefs.com/atom.htm
http://hi.fi.tripod.com/timeline/ -
Thomson
He discovered the electron and thught atoms was a sphere of postive force with electrons around it. http://www.timetoast.com/timelines/the-atom-timeline
http://hi.fi.tripod.com/timeline/ -
Rutherford
He discovered the nucleus and he used the results of his gold-foil experiment to state that all the mass of an atom were in a small positively charged ball at the center of the atom. http://www.nobeliefs.com/atom.htm
http://hi.fi.tripod.com/timeline/ -
Bohr
He stated that the electrons moved around the nucleus in successively large orbits. http://hi.fi.tripod.com/timeline/
http://www.timetoast.com/timelines/the-atom-timeline
http://hi.fi.tripod.com/timeline/ -
Shroedinger
He introduced the Shroedinger Equation, a wave equation that describes the form of the probability waves that govern the motion of small particles and how these waves are altered by external influences. http://www.timetoast.com/timelines/the-atom-timeline
http://hi.fi.tripod.com/timeline/
http://www.nobeliefs.com/atom.htm -
Heisenberg
He made a uncertaniyprincable. The uncertainty principle states that you cant measure the current position of a particle and also measure the position it will be in after it moves. http://www.timetoast.com/timelines/the-atom-timeline
http://hi.fi.tripod.com/timeline/
http://www.nobeliefs.com/atom.htm
