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antiatom

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an·ti·at·om  (nt-tm, nt-)
n.
An atom composed of antiparticles.
antiatom  (nt-tm, nt-)
An atom composed of antiparticles. An antiatom consists of positrons, antiprotons, and antineutrons. It has the same mass and spin as an ordinary atom, and the same amount of charge and magnetic moment, but the charge and magnetic moment are the opposite of those of an ordinary atom.
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Scientists couldn't study their properties, however, because the antiatoms were traveling at nearly light speed and were almost instantly annihilated by contact with matter.
Putting the brakes on antihydrogen. (Physics) by Science News
The easiest way to prove that they have made their antiatom is to annihilate it.
Phenomenon intrigues physicists. (News) by Swiss News
Creating a single antiatom was difficult - and for now, scientists say, making the millions needed for rocket fuel is impossible.
Atom's opposite by Costello, Emily / Science World
 
 
 
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