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
Option b is the correct answer.
The mass of electron is very small as compared to the mass of the neutron.
Mass of electron =9.1×10−31kg
Mass of neutron =1.67×10−27kg