-
201
Thales 624BC
Thought everything was made of water. -
202
Democritus 460BC
Said all matter was made of atoms. Thought the atom was a solid sphere. -
203
Aristotle 384BC
Didn't believe in the aromic theory and thought everything was made up of fire, water, earth, and air. -
Newton
Said matter was formed of solid, massy particles. Thought the artom was a solid sphere. -
Dalton
FIrst person to have expirimental evidence. The atomic theory. -
Becquerel
Radioactivity -
Thomson
Exsistance of electrons -
Rutherford
Gold foil -
Millikan
Found the charge of an electron -
Bohr
Model of an atom and said that all electrons orbited around the nucleus -
Schrodinger
Predicted the odds of electron location. Proved the Bohr model wrong. -
Chadwick
Proved that there were neutrons