The mass of electron is:
Correct answer: B. 1836 times less than mass of proton
- A. 1838 times more than mass of proton
- B. 1836 times less than mass of proton
- C. 1836 times more than mass of neutron
- D. 1836 times more than mass of hydrogen atom
Explanation
The mass of an electron is only about 1/2000 the mass of a proton or neutron, so electrons contribute virtually nothing to the total mass of an atom.
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About Discovery of the Proton
The discovery of the proton follows the study of positive rays, also called canal rays, observed in discharge tubes and later identified as positively charged particles. The work of Goldstein and Rutherford is linked to the proton's charge, relative mass and role in the nuclear model, distinct from the discovery of the electron.
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