Question

radiation and shielding exit - ticket. which of the substances would be the minimum protection to stop alpha radiation? possible points: 1. paper/skin. aluminum. lead. concrete. lead. aluminum. paper/skin. concrete.

Explanation:

Alpha particles are relatively large and slow - moving. They can be stopped easily by a thin layer of material. Paper or skin is sufficient to stop alpha radiation as alpha particles have low penetrating power. Lead, aluminum, and concrete are over - kill for stopping alpha radiation as they are used for more penetrating types of radiation like beta, gamma, and neutrons.

Answer:

Paper/Skin