Alpha particles are the least harmful type of radiation upon external exposure of animal tissues.

Question

Quizplus · Accepted Answer

Alpha particles are large and heavy, meaning they have a short range and are easily stopped by a sheet of paper or even the outer layers of skin. This makes them the least harmful type of radiation upon external exposure of animal tissues. However, if alpha-emitting materials are inhaled or ingested, they can cause serious damage to internal tissues.

Alpha Particles Are the Least Harmful Type of Radiation Upon