Which of the following statements about the electron is incorrect?
(a) It is a 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.

Answers (1)

The answer is the option (b)

The mass of electron is equal to the mass of neutron because the mass of a neutron is 1.67\times 10^{-27} kg and that of an electron is 9.1\times 10^{-31} kg.

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