Mass of Electron, proton, neutron
Mass of Electron, proton, neutron
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Mass of electron
: The
electron mass
(me) is the mass of a stationary electron, also known as the rest mass of the electron. The value of mass of an electron is, 9.109 383 7015 x 10-31 kg, 0.00054858 amu.
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The mass of the electron was determined directly from combining two measurements.
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1. The mass-to-charge ratio of the electron 2. The charge of the electron
The mass-to-charge ratio of the electron was first estimated by Arthur Schuster in 1890 .
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in 1897, J. J. Thomson showed that cathode rays consist of streams of particles later called electrons, and made more precise measurements of their mass-to-charge ratio using a cathode ray tube.
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The charge of the electron was determined by Robert A. Millikan in his oil drop experiment in 1909.
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Proton mass mp = 1.672621898×10−27 Kg. Mass of proton is higher than the mass of electron.
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Mass of Neutron is , mN 1.674927471 x 10-27kg.
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Read the Full Article on Mass of Electron, roton and Neutron
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