Answer
Match:
a. does not penetrate skin- 1. alpha particle
b. shielding protection includes lead or thick concrete- 3. gamma radiation
c. can be very harmful if ingested- 1. alpha particle
Work Step by Step
alpha particles cannot travel fast or farther because of their large mass. They cannot penetrate into the skin but can be dangerous to the internal organs if alpha emitters are ingested.
Gamma rays can pass through body tissues and can be hazardous. Hence shielding with lead or concrete is necessary to keep people safe from exposure.
