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460
DEmocritis
first proposed the existance of an ultimate particle -
Dmitri Mendeleev
Proposed the perodic law asnd developed the first periodic table -
Robert Milikan
Determined teh unit of charge of the electron -
Niels Bohr
Appled quantum theory by assuming that electrons travel in stationary orbits -
Heinsberg
He is best known for his uncertainty principle, which restricts the accuracy with which some properties of atoms and particles--such as position and linear momentum--can be determined simultaneously -
Erwin Schrodinger
The introduction of wave mechanics stands