Which of the following particle has the greatest mass?
Correct answer: C. Proton
- A. Electron
- B. Positron
- C. Proton
- D. Photon
Explanation
Protons are subatomic particles found in the nucleus of atoms. They have a much greater mass than electrons, approximately 1.673 x 10-27 kilograms, making them over 1,800 times more massive than electrons. Protons have a positive electric charge.
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Atomic nuclei contain protons and neutrons, with nuclear size, mass defect and binding energy describing their stability. The work covers alpha, beta and gamma decay, decay equations, half-life and decay rate, along with radiation safety and medical applications such as imaging, radiotherapy and tracers.
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