Emissions from alpha decay require the least amount of shielding.Which best describes why the emissions from alpha decay are so easily blocked compared to the emissions of other types of radioactive decay?

Alpha particles are relatively massive and carry a +2 charge. Compared with beta particles, they interact more strongly with matter and lose energy quickly, so a sheet of paper or the outer layer of skin can stop them. Gamma rays are photons, not particles with mass and charge like alpha particles. Therefore, choice D correctly describes alpha particles as having more mass and charge than beta particles.

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