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Democritus (460 BC)
He discovered that everything is physically made up of atoms. They are physically but nit geometrically invisible.
He used thouhts to make his discovery.
http://atomictimeline.net/index.php -
Thompson
He dicovered the electron
He shot electrical currents through pipes of glass filled with gal of a low density.
Raisin in the plum pudding model
http://www.nobeliefs.com/atom.htm -
Dalton
Formed the atomic theory which states all matter had indestructable,little particles named atoms
http://www.nobeliefs.com/atom.htm -
Aristotle (340 BC)
He believed that no matter how many times you cut a form of matter in half, you would still have a smaller piece.
Used the four elements, earth, air, water, and fire.
http://www.nobeliefs.com/atom.htm -
Rutherford
States that all mass of atom are in small, posotive particles that are all at the center.
used experiments with gold foil.
http://www.nobeliefs.com/atom.htm -
Bohr
Stated that electrons moved around the nucleus in an orbit.
Hydrogen experiments.
called the Bohr atomic model.
http://atomictimeline.net/index.php -
Heisenburg and Schrodinger
Schrodinger equation forms waves that govern motion of all small particles and can be altered by outward forces.
Two slit experiment
Electron cloud model.
http://atomictimeline.net/index.php
