Answer:
B. False
Explanation:
The mass of a neutron is nearly the same mass of a proton whereas the electron is much less massive.
Exact masses are:
Neutron = 1.6749286x10²⁷ kg
Proton = 1.6726231x10⁻²⁷ kg
Electron = 9.1093897x10⁻³¹ kg
The mass of a proton plus the mass of an electron is:
1.6735340x10⁻²⁷ kg.
This mass is different to the mass of the neutron. Thus, the answer is:
B. False
