-
101
Thales - 624 BC
He thought everthing was made by water & the world floated on water -
101
Democritus- 460 BC
All matter was made of atoms. -
101
Aristotle- 384 BC
All substances were made of fire, earth, water, & air. -
Issac Newton
Matter is formed of solid impenitrable particles. -
John Dalton
First atomic theory, evidence based. -
Henri Becqurel
discovered radio active -
Joseph John Thompson
Discovered electron. -
Ernest Rutherford
discovered nucleus. -
Millikan
Found the charge of the electron -
Bohr
Thought that electrons orbited the nucleus -
Schrodinger
Proved Bohr model wrong. -
James Chadwick
discovered the neutron