===About Antiparticles===
: *Many [[Subatomic Particle|particle]]s of [[matter]] have [[antimatter]] counterparts which have the same [[mass]] but opposite [[Electrical Charge|electrical charge]].: *[[Antiparticle]]s are denoted by a bar over the top of the symbol used for their [[matter]] counterpart.*During [[Pair-Production|pair-production]] a [[Subatomic Particle|particle]] and its '''antiparticle''' appear.: *When a [[Subatomic Particle|particle]] meets its '''antiparticle''' they [[Annihilation|annihilate]] one another producing a pair of [[photon]]s.: *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]].