equal to the mass of a proton Neutron Electron Proton

The mass of a proton is approximately 1.67 x 10^-27 kilograms.

The mass of a neutron is also approximately 1.67 x 10^-27 kilograms.
The mass of an electron is approximately 9.11 x 10^-31 kilograms.

The mass of a proton is approximately equal to the mass of a neutron, while the mass of an electron is significantly smaller.

The mass of a proton is about 1.67 x 10^-27 kilograms, or 938.27 MeV/c^2 in energy units.

The mass of a neutron is also about 1.67 x 10^-27 kilograms, or 939.57 MeV/c^2.

In contrast, the mass of an electron is much smaller, approximately 9.11 x 10^-31 kilograms, or 0.511 MeV/c^2.

The mass of a proton is approximately 1.67 x 10^-27 kilograms.

To find the mass of a neutron and an electron, we can compare them to the mass of a proton.

- Neutron: A neutron has a mass that is very similar to that of a proton. In fact, the mass of a neutron is approximately the same as that of a proton, with a slightly larger value due to the presence of an extra electrically neutral particle. Therefore, the mass of a neutron is also approximately 1.67 x 10^-27 kilograms.

- Electron: An electron is much lighter compared to a proton or neutron. To find the mass of an electron, we need to consider its mass in terms of a unit called the atomic mass unit (u) which is defined as 1/12th the mass of a carbon-12 atom. The mass of an electron is approximately 9.11 x 10^-31 kilograms or 0.0005486 atomic mass units.

In summary:
- Mass of a proton: Approximately 1.67 x 10^-27 kilograms
- Mass of a neutron: Approximately 1.67 x 10^-27 kilograms (similar to a proton)
- Mass of an electron: Approximately 9.11 x 10^-31 kilograms or 0.0005486 atomic mass units (much lighter than a proton or neutron)