Protons and neutrons have similar mass, while electrons are significantly less massive. Protons are positively charged, neutrons are neutral, and electrons are negatively charged.
Protons and neutrons have approximately the same mass, about 1.67 × 10-24 grams, referred to as one atomic mass unit. However, electrons are nearly 2000 times less massive than protons or neutrons.
While protons are positively charged particles, neutrons have no charge but similar mass to protons. The relative charges of electrons and protons are -1 and +1, respectively.
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