-
101
Thales-546
Believed everything was made of water -
101
Democritus-460
He thought up the atom and thought that all matter was made up of atoms -
101
Aristotle-322
He didn't believe in atomic theory everything is made up of fire, water, earth, and air -
Sir Issac Newton
He thought that matter is formed of solid, massey impenetrable particles -
John Dalton
The atomic theory and was the 1st person to have experimental evidence -
Henri Becquerel
discovered radioactivity -
Joseph John Thomson
discovered the electron -
Ruthuford
Aimed a beam of alpha particles at a gold foil a few particles hit something in the middle and bounced back instead of going straight through which proves there is a nucleus -
Millikan
found the charge of an electron -
Niels Bohr
thought electrons orbited around the nucleus contributed the Bohr Model -
Schrodinger
Proved Bohr model wrong, Predicted the odds of electron location, and quatum mechanical model -
james chadwich
proves the exsistance of the neutron