===About Antimatter===
: *Many [[Subatomic Particle|particle]]s of [[matter]] have '''antimatter''' counterparts which have the same [[mass]] but opposite [[Electrical Charge|electrical charge]].: *During [[Pair-Production|pair-production]] a [[Subatomic Particle|particle]] and its '''antimatter''' counterpart appear.: *Most '''antiparticles''' are given the name of their counterpart [[Subatomic Particle|particle]] with the addition of the prefix '''anti'''. However, the '''antiparticle''' counterpart of the [[electron]] is known as the [[positron]].*[[Antimatter]] appears to be rare in the [[universe]] compared to [[matter]] which confuses scientists as the [[Big Bang Theory]] suggests there should have been equal quantities of [[matter]] and [[antimatter]] produced in the early [[universe]].*[[Antimatter]] is produced in high-energy processes such as cosmic ray interactions and particle collisions.*[[Antimatter]] has potential applications in [[Medical Imaging|medical imaging]] and cancer treatment.*[[Antimatter]] propulsion is a theoretical concept for future space travel.
{| border="1" style="border-collapse:collapse"
|-
| style="height:20px; width:100px; text-align:center;"|
[[ProtonAntiproton]]
| style="height:20px; width:100px; text-align:center;"|<math>\bar{u}\bar{u}\bar{d}</math>
| style="height:20px; width:100px; text-align:center;"|<math>Q=-1</math>
|-
| style="height:20px; width:100px; text-align:center;"|
[[NeutronAntineutron]]
| style="height:20px; width:100px; text-align:center;"|<math>\bar{u}\bar{d}\bar{d}</math>
| style="height:20px; width:100px; text-align:center;"|<math>Q=0</math>