Question

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.

Answer 1

Answer: (B)

The mass of electron is equal to the mass of neutron.

Answer 2

: The mass of electron (i.e., $9.10939 \times 10^{- 31}$kg) is very small as compared to the mass of neutron

($i.e.,1.67493 \times 10^{- 27}kg$).