Question

The absolute mass of a neutron is:

• A. Half of the mass of an electron
• B. Slightly greater than the mass of a proton
• C. Equal to the mass of an electron
• D. Twice the mass of a proton

Answer 1

The correct option is B Slightly greater than the mass of a proton

The absolute mass of a neutron is slightly greater than the mass of a proton.
Mass of a neutron = $1.6750\times {10}^{-27}\text{kg}$ and mass of a proton = $1.6727\times {10}^{-27}\text{kg}$