Millikan: He discovered that the weight of an electron is 1840 times smaller than a hydrogen atom (atomis mass of 1)
Thomson: Thomson was the first person to suggest the theory of the atom containing positive and negative particles, and demonstrated the latter which called electrons
Robert Millikan (1909)- Determined unit charge of the electron with his oil drop experiment in 1909. This allowed calculation of the mass of electrons and positively charged atoms
With the combined results of Thomson and Millikan, a value for the electron mass was obtained
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J J Thomson determined the specific charge of the electron
But Millikan with his oil drop experiment determined the charge of an electron
So it is easier for us to determine the mass of an electron
Thanks to both scientists.
He discovered that the weight of an electron is 1836 times smaller than that of a hydrogen atom (atomis mass of 1)
he discovered the electron
Niels Bohr proposed the planetary model for the atom.
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Lavoisier is not known for an atomic theory.
he did not develop anything regarding the 'atomic theory' for he was against that theory.
Robert A. Millikan was the first to determine the electrical charge of the electron.
Robert Millikan did his experiment by bombarding a thin sheet of beryllium with an alpha particle newtest3
Thales was not a chemist; important contributions in geometry and astronomy.
he discovered the electron
Antoine Lavoisier was a French nobleman and chemist. His contribution to the development of the modern atomic theory was his idea of the possibility of an Atomic Mass.
dalton, rutherford ,etc
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Robert Duane Cowan has written: 'The theory of atomic structure and spectra' -- subject(s): Atomic spectroscopy, Atomic structure
Niels Bohr proposed the planetary model for the atom.
Ernest Rutherford contributed to the atomic theory through his gold foil experiment. He discovered that there was a positively charged central core to the atom and he called it the nucleus.
Leukippus, Democritus, Dalton, Bohr, Rutherford, Thomson and many others.
Benjamin Franklin made several contributions to various scientific fields. In atomic theory, he was the first to propose how to measure the size of an atom.