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antiatom


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An atom in which all the particles of an ordinary atom are replaced by their antiparticles, i.e. electrons by positrons, protons by antiprotons, and neutrons by antineutrons. An antiatom cannot co-exist with an ordinary atom since the atom and the antiatom would annihilate each other with the production of energy in the form of high-energy photons. Antiatoms have been created artificially in laboratories.

Subjects: Physics.


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