-
Dalton
Stated elements had particles that combined in simply ways. Discovered atoms. -
Avogadro
Led to understanding of atoms molecular weight -
Kekule
Developed system for visualizing the structure of organic molecules -
Mendeleev
Found three elements that were unknown at the time -
Thomson
He stated atoms where not simply solid spheres. Discovered electrons -
Lewis
Stated electrons existed in shells around the nucleus -
Rutherford
Stated most atoms are made of space. -
Bohr
Stated electrons orbited nucleus in energy levels