-
101
Aristotle-384
Didint believe in the atomic theory. Believed all substances were made of fire, water ,earth, and air -
101
Democritus-400 BC
First person to think of the atom. thought it was a solid sphere. -
101
Thales 624 BC
thought all things were made of waster -
Dalton
Atomic theory first to have experimental proof -
henri becquerel
discovered reactivity, couldnt explain it -
Millikan
found the charge of an electron -
Niels Bohr
thought electrons orbited around the nucleus -
Erwin Schrodinger
atomic model was ythe quantum mechanical model