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Thomson's Discovery of Electrons

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Question

Question 05

Which of the following statements about the electron is incorrect ?

(a) It is negatively charged particle

(b) The mass of electron is equal to the mass of neutron

(c) It is a basic constituent of all atoms

(d) It is a constituent of cathode rays

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Solution

Option b is the correct answer.

The mass of electron is very small as compared to the mass of the neutron.

Mass of electron $= 9.1 \times 10^{- 31} k g$

Mass of neutron $= 1.67 \times 10^{- 27} k g$

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