-
344
Aristotle
form without matter is on one end and matter without form is on the other end. he thought Democritus idea was worthless. Aristotle used laws of motion.
http://www.iep.utm.edu/aristotl/ -
460
Democritus
developed the idea of Atoms thought that it ended at some point, a smallest possible bit of matter. He asked himself," If you break a piece of matter in half again, how many breaks will you have to make before you can break it no farther.
http://www.nobeliefs.com/atom.htm -
Dalton
discovers that matter consist of atoms. he performed experiments with various chemicals that showed that matter consist of atoms.
http://www.nobeliefs.com/atom.htm -
Thomson
discovers the electron and proposed a model fro the structure of the atom. He knew electrons had a negative charge and thought that must have a positive change. -
Rutherford
Indentified the particles of the nucleus as discrete positive charges of matter.He used alpha particles.
http://www.nobeliefs.com/atom.html -
Bohr
came up with theory that said the electrons do not spiral into the nucleus and came up with rules for what does happen. Bohrs used rule to show how atoms operate.
http://www.nobleliefs.com/atom.html -
Heisenburg and Schrodinger
created an idea that no expirement can measure the position and momentum of particle. He used Schrodinger theory on waves.
http://www.nobleliefs.com/atom.html
