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the mass of protons and neutrons is a. barely more than the mass of the electrons. b. significantly more than the mass of the electrons. c. equal to the mass of the electrons.
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the mass of protons and neutrons is a. barely more than the mass of the electrons. b. significantly more than the mass of the electrons. c. equal to the mass of the electrons.

User Robin Castlin
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The amu (atomic mass unit) of a proton and neutron are equal. The amu of the electron is significantly smaller than these. 
User Utyi
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