Changes

: *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]].