Antimatter consists of ______________?
Correct answer: D. All of above
- A. Antiproton
- B. Antineutron
- C. Positron
- D. All of above
Explanation
Antimatter is made of antiparticles, including antiprotons, antineutrons and positrons, each corresponding to an ordinary particle with opposite relevant quantum properties. The likely mistake is choosing only positron because it is the familiar antiparticle of the electron, but antimatter includes antiparticles of many particles.
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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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