-
John Dalton
He proposed the atomic theory based upon amounts of mass. -
J.J. thompson
Used a CRT to determine the size of a electron. -
Rutherford
He estimated atom size and found that mass in concentrated in the center of the nucleus -
Neils Bohr
He developed an explaination and gave understanding to the periodic table of elements. -
Schrodinger
He viewed electrons as continuous clouds, and introduced wave mechanics.