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How do the masses of subatomic particles compare on a relative basis? do the proton and neutron have exactly the same mass?
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How do the masses of subatomic particles compare on a relative basis? do the proton and neutron have exactly the same mass?

User Mostafa Elmoghazi
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The electron has a mass of 1/1840 of a proton or neutron. Protons and neutrons have the same mass.

User Stefano Azzalini
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