Compare elementary particles with each other, that is, find what is common and what are the differences between a proton and a neutron, a proton and an electron.
The common between a proton and a neutron: make up the nucleus of an atom, the mass is 1.
Differences between a proton and a neutron: a proton has a charge and a neutron has no charge.
Common between a proton and an electron: charged particles.
Differences between a proton and an electron: a proton is a positively charged particle, and an electron is a negatively charged particle, the mass of a proton is greater than the mass of an electron.
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