Question

Why are reactions that emit alpha particles generally considered more safe than those that emit beta particles?

Beta particles emit gamma rays.
Alpha particles have no charge.
Beta particles travel at a very low speed.
Alpha particles can be blocked very easily.

Answer 1

D. Alpha particles can be blocked very easily

Answer 2

The correct answer is the last option. Alpha particles are generally considered more safe than those that emit beta particles since they can be blocked very easily. They are least dangerous since they do not penetrate deeply in the skin. Clothing can even stop the penetration of alpha particles. However, they can be very dangerous when ingested or inhaled.