-
460
Democritus
He advanced the hypothesus that matter was made up of atoms -
Dec 1, 624
Thales of Miletus
He came up with the idea the everything on earth was round. -
Issac Newton
He said atoms are held together by attractions -
Aristotle
said atoms are round -
henri becquerel
he discovered radioactivity and the atomic theory -
Joseph Thompson
he discovered the electron -
Rutheford
Created the nucleous