Neutrons moving with an energy of 1.2 MeV are called_______________?
Correct answer: A. Fast neutrons
- A. Fast neutrons
- B. Slow neutrons
- C. Moderate neutrons
- D. All are possible
Explanation
Neutron speed is related to its kinetic energy, and a neutron with energy in the MeV range is classified as a fast neutron. Slow or thermal neutrons have energies around 0.025 eV, which is enormously smaller than 1.2 MeV. The likely error is treating every neutron as slow because it has no charge.
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About Discovery of the Proton
The discovery of the proton follows the study of positive rays, also called canal rays, observed in discharge tubes and later identified as positively charged particles. The work of Goldstein and Rutherford is linked to the proton's charge, relative mass and role in the nuclear model, distinct from the discovery of the electron.
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