-
101
Thales
624 B.C. ; Thought all things were made of water -
102
Democratis
460 B.C. ; First person to think of atom. Thought it was a solid sphere. -
103
Aristotle
384 B.C. ; Didn't believe in atomic theory. Thought everything was made up of water, earth, air, and fire. -
Issac Newton
Matter formed of solid, liquid, and mass -
John Dalton
Matter is atoms -
Becquerel
Discovered radioactivity -
JJ Thompson
Discovered the electron -
Robert Millilean
Found mass and charge of the electron -
Rutherford
Discovered nucleaus -
Niels Bohr
Discovered how eletrons travel around nucleaus. -
Francis Aston
Mass spectograph -
Erwin Schrodinger