History of the atom Timeline by Ethan and toree

Aristole ( 350 BC )

350

he believed that the atoms were continually moving anad that they were in a void. He thought thateverything was made of fire, water, and earth. He used scientific facts and theories from obersavtions, and ideas of the atoms form. https://www.gaggle.net/gaggleVideoProxy.do?op=view&v=a97fd6ea4760223b48fba9cc180e7686

Democritus (400 BC)

400

he said that if you keep cutting things in half you will eventually have an atom. he stated that everyting was made of atoms. After they were an atom you can not cut hem anymore, they are uncuttable. https://www.gaggle.net/gaggleVideoProxy.do?op=view&v=a97fd6ea4760223b48fba9cc180e7686

Dalton

Feb 27, 1808

the first model that showed that matter was made up of smaller particles. https://www.gaggle.net/gaggleVideoProxy.do?op=view&v=03ed97f7a2138f462cbbeaeff5296a6f

Thompson

Feb 27, 1904

Thompson is the one who dicovered that the electrons are in the atom and that they have no mass. hes the one who used the plum pudding model. https://www.gaggle.net/gaggleVideoProxy.do?op=view&v=a97fd6ea4760223b48fba9cc180e7686

rutherford

Feb 27, 1911

he dicovered that all atoms have a nucleus. in the gold foil experiment he discovered that the atoms have a nucleus. https://www.gaggle.net/gaggleVideoProxy.do?op=view&v=56f60323e745304a6deba9eeba2c9245

bohr

Mar 7, 1913

he discovered that electrons reavls around the nucleus. he used a mathmadicail model to base the thoery of the hydrgen atom based on the quantaium theory it explained that why the atoms emitted light fixed wavelenghs. http://en.wikipedia.org/wiki/Niels_Bohr

Heisenberg and Schrodinger

Mar 7, 1920

he thought that the electron moved around in the nucleus in little waves, they did not orbit, they made "orbital" stretched out into diferent shapes. they believed that the nucleus is still in the center of the atom and the electrons move around in a wavy pattern. http://en.wikipedia.org/wiki/Heisenberg_picture