_______________ can expel proteons from paraffins ?
Correct answer: C. Neutron
- A. Electron
- B. Positron
- C. Neutron
- D. None of above has such capability
Explanation
Fast neutrons can knock protons out of hydrogen-rich paraffin by elastic collisions, because paraffin contains many hydrogen nuclei and a neutron has nearly the same mass as a proton. An electron cannot efficiently expel a proton from the nucleus, while a positron would not produce the described collision. The likely alternative is “none,” caused by assuming that an uncharged neutron cannot exert an effect.
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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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