Which of the following particles has the greatest mass?
Correct answer: C. Proton
- A. Electron
- B. Positron
- C. Proton
- D. Photon
Explanation
A proton is a baryon composed of quarks and is significantly more massive than leptons like electrons and positrons. A photon has zero rest mass. Therefore, of the options listed, the proton has the greatest mass.
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