Hii aspirants
let me clear your doubt.
The mass of protons and neutrons are approximately same,and it is about 1.67 × 10-24 grams.and it is equal to one atomic mass unit (amu) or one Dalton.and the mass of an electron is only about 1/2000 the mass of a proton or neutron.
I hope my answer will help you out
Good luck
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