Antimatter

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'''Antimatter''' is much like normal matter, but its constituent particles carry the opposite electrical charge of their normal matter counterparts.  Antiparticles can be created from energy in a particle accelerator, and they can form naturally during certain kinds of radioactive decay.
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'''Antimatter''' is much like normal matter, but its constituent particles carry the opposite electrical charge of their normal matter counterparts.  Antiparticles can be created from energy in a particle accelerator, and they can form naturally during certain kinds of [[radioactive decay]].
  
*The anti-particle for the electron is the positron.  It has the same mass as an electron, but it carries a positive charge instead of a negative charge.
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*The anti-particle for the electron is the positron.  It has the same mass as an [[electron]], but it carries a positive charge instead of a negative charge.
*The anti-particle for the proton is the antiproton.  It has the same mass as a proton and a negative charge.
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*The anti-particle for the proton is the antiproton.  It has the same mass as a [[proton]] and a negative charge.
*The anti-particle for the neutron is the antineutron.  It has the same mass as a neutron and carries no charge, but it will still annihilate a neutron because the antineutron itself is composed of charged antiquarks.
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*The anti-particle for the neutron is the antineutron.  It has the same mass as a [[neutron]] and carries no charge, but it will still annihilate a neutron because the antineutron itself is composed of charged antiquarks.
 
*Smaller subatomic particles like quarks also have antiparticles.
 
*Smaller subatomic particles like quarks also have antiparticles.
 
*Massless particles like photons generally don't have antiparticles.
 
*Massless particles like photons generally don't have antiparticles.
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If a particle of matter comes into contact with its anti-particle, both will "annihilate" each other, converting their combined mass into energy.
 
If a particle of matter comes into contact with its anti-particle, both will "annihilate" each other, converting their combined mass into energy.
  
Antiparticles can chemically interact with each other in much the way ordinary particles do.  For instance, an antiproton and a positron can combine to form anti-hydrogen.
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Antiparticles can chemically interact with each other in much the way ordinary particles do.  For instance, an antiproton and a positron can combine to form anti-[[hydrogen]].
  
 
==See Also==
 
==See Also==

Revision as of 17:37, 14 May 2008

Antimatter is much like normal matter, but its constituent particles carry the opposite electrical charge of their normal matter counterparts. Antiparticles can be created from energy in a particle accelerator, and they can form naturally during certain kinds of radioactive decay.

  • The anti-particle for the electron is the positron. It has the same mass as an electron, but it carries a positive charge instead of a negative charge.
  • The anti-particle for the proton is the antiproton. It has the same mass as a proton and a negative charge.
  • The anti-particle for the neutron is the antineutron. It has the same mass as a neutron and carries no charge, but it will still annihilate a neutron because the antineutron itself is composed of charged antiquarks.
  • Smaller subatomic particles like quarks also have antiparticles.
  • Massless particles like photons generally don't have antiparticles.

If a particle of matter comes into contact with its anti-particle, both will "annihilate" each other, converting their combined mass into energy.

Antiparticles can chemically interact with each other in much the way ordinary particles do. For instance, an antiproton and a positron can combine to form anti-hydrogen.

See Also

External Links

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