-
101
Thales- 624-524BC
Thought everything was made of water -
102
Democritus- 460BC
Created the idea of the atom. Thought it was a round ball. NO experiments! -
103
Aristotle- 384-322BC
Believed that all substances were made of the four elements fire, water, earth, and air. -
Sir Issac Newton
Matter is solid, massy, and impenatrable. -
John Dalton
Supported the Atomic Theory "Law of Fixed Proportions." First person to have experimental evidence. -
Herri Becquerel
Discovered Radioactivity anf the Atomic Theory. -
Ernest Rutherford
Discovered the nucleus -
Millikan 1909-1912
Found the charge of an electron. -
Niels Bohr 1911-1916
Thought that electrons orbited around the nucleus. -
Schrodingers
His atomic model was the quantum mechanical model predicts the odds of electron cloud. -
James Chadwick
Proved the existance of newtrons.