Answer: positron

AnswerCrossword Clue
POSITRONSubatomic particle
POSITRONCertain antiparticle
POSITRONAntielectron
POSITRONFirst antiparticle discovered
POSITRONBasic particle
POSITRONPhysics particle
POSITRONBeta decay emission, sometimes
POSITRONAntiparticle first observed in 1929
positronparticle with the same mass as an electron but a positive charge
positronan electron but with a positive charge, also POSITON