mass of electron is 0.000548597 amu or 9.1into ten rays power minus 31 kg
for proton 1.0072766 amu or 1.6726ten rays power minus 27 kg
and it is 1837 time heavier than electron
for neutrons 1.0086654amu or 1.6749ten rays power minus 27 kg and 1824 times heavier than electron