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Joseph John Thomson, and others, while at the Cavendish Laboratory of the University of Cambridge, made a rough estimate of the electronic charge. Robert Andrew Millikan, between 1906 and 1914, enhanced the work of Thompson, et al, and determined the electric charge to much higher precision. Along with the mass-to-charge ratio determined by electolysis, this gave the best values for atomic masses. These results were the most accurate basis for the atomic scale. The largest change was measured in the 1930s. Today, the best value of the electronic charge is only 1 percent higher than that measured by Milllikan in 1913. Reference: "The Discovery of Subatomic Particles", Steven Weinberg, Scientific American Library, 1983, pages 77, 78, and 101.

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The work of which two scientists was most important in determining the mass of an eletron?

The work of J.J. Thomson and Robert Millikan was most important in determining the mass of an electron. Thomson discovered the electron's existence based on cathode ray experiments, while Millikan conducted the oil drop experiment to measure the charge of the electron and hence its mass.


The work of what two scientists was most important in determining the mass of an eletron?

The work of J. J. Thomson and Robert Andrews Millikan were most important in determining the mass of an electron. Thomson discovered the electron through his experiments on cathode rays, while Millikan conducted the oil drop experiment, which helped to calculate the charge and mass of the electron.


What experimental evidence did Thomson have atoms of all elements contain electrons?

The deflection of cathodic rays was the source of inspiration for Thomson.


What experimental evidence did Thomson have for the atoms of all elements contain electrons?

The deflection of cathodic rays was the source of inspiration for Thomson.


He conducted the cathode-ray tube experiment?

J.J Thomson conducted the cathode-ray tube experiment in 1911.


Who conducted experiments to determine the quantity of charge carried by electron?

Robert A. Millikan conducted the oil drop experiment in 1909 to determine the quantity of charge on an electron. By measuring the forces acting on charged oil droplets in an electric field, he was able to calculate the charge of an electron as approximately 1.6 x 10^-19 coulombs.


Robert millikan's major contributions to the atomic theory?

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


When did JJ Thomson do stuff about the atom?

Thomson did much of his most important work in the late 1800's. His famous cathode ray experiments where conducted in 1897.


Who performed an experiment with cathode ray tubes?

J. J. ThomsonJ. J. Thomson did the cathode ray experiment where he discovered the existence of electrons.


Describe at least four properties of electrons that were determined based on experiments of Thomson and Millikan?

two properties are mass and charge... I haven't found any more. sorry


What did the scientist Thomson discover?

J.J. Thomson discovered the electron in 1897. He conducted experiments with cathode rays that led him to propose the existence of these tiny, negatively charged particles. Thomson's discovery laid the foundation for our understanding of the structure of atoms.


Are there any museums or places named after JJ Thomson?

Yes, there is a museum named after J.J. Thomson called the Cavendish Museum in Cambridge, England. However, it is more focused on the history of the Cavendish Laboratory where Thomson conducted his research, rather than solely dedicated to him.