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Gamma ray is a type of radiation that has no mass & no charge. Gamma rays have a high penetrating power. Text us. Tags: gamma ray, radiation, mass. Wednesday, February 01 2012.
An alpha particle has a positive charge. because the 2 protons have a positive charge. 2. An alpha particle has by far the most mass of the. three types of radioactivity. It is the type most likely. to collide with other atoms which means that. (i) alpha particles have the least penetrating ability of the three types.