Answer :
Although protons and neutrons are similar in size, they are both significantly heavier than electrons (approximately 2,000 times as massive as an electron).
A proton's positive charge is equivalent to an electron's negative charge in strength. The proton is a stable subatomic particle with a rest mass of 1.67262 1027 kg, or 1,836 times the mass of an electron, with a positive charge that is equivalent to one electron's charge in magnitude.
The mass of a neutron is somewhat more than that of a proton. These are frequently expressed in terms of atomic mass units, where one atomic mass unit is equal to 1/12th the mass of an atom of carbon-12. As a result, neutrons have the most mass. Proton mass is 1.6726219 1027 kg.
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