Final answer:
The symbol that represents a type of radiation with the same mass as an electron and a positive charge is β+ or positron.
Step-by-step explanation:
The symbol that represents a type of radiation that has the same mass as an electron and a positive charge is β+ or positron. A positron is a subatomic particle that is the antiparticle of an electron. It has the same mass as an electron but a positive charge, whereas an electron has a negative charge.
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