Millikan’s contributions to the development of atomic theory is the determination of
-
charge on electron
- positive rays
- charge to mass ratio
- cathode rays
The correct answer is: A
Explanation
In 1910, Millikan successfully measured the charge of the electron to be 1.6 x 10\(^{-19}\)C.
Positive rays were discovered by Eugen Goldstein, in 1886.
J.J. Thomson discovered the charge-to-mass ratio of an electron in 1897:
Cathode rays were discovered by. J. J. Thomson
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