The antiparticle of electron is: ______?
Correct answer: D. Positron
- A. Proton
- B. Meson
- C. Neutron
- D. Positron
Explanation
The electron's antiparticle is the positron, which has the same mass as an electron but an equal positive charge instead of a negative charge. A proton may be chosen because it is also positively charged, but it is much more massive and is not the electron's antiparticle.
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About Composition of Atomic Nuclei
Atomic nuclei contain positively charged protons and electrically neutral neutrons, collectively called nucleons. Questions use atomic number, mass number and nuclear notation to identify isotopes, isobars and isotones, and may connect nuclear composition with nuclear charge, mass defect, binding energy and the stability of the nucleus.
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