Final answer:
A positron is represented by the symbol +B, B+, B, or +1. It is the antimatter counterpart to an electron, having the same mass but opposite charge. When a positron encounters an electron, there is a mutual annihilation in which all the mass of the positron-electron pair is converted into pure photon energy.
Step-by-step explanation:
A positron is represented by the symbol +B, B+, B, or +1. It is the antimatter counterpart to an electron, having the same mass but opposite charge. When a positron encounters an electron, there is a mutual annihilation in which all the mass of the positron-electron pair is converted into pure photon energy.