Consider the following information: i. The layer of dead skin on our bodies is sufficient to protect

Consider the following information: i. The layer of dead skin on our bodies is sufficient to protect us from most -particle radiation. ii. Plutonium is an -particle producer. iii. The chemistry of Pu4 is similar to that of Fe3 . iv. Pu oxidizes readily to Pu4 . Why is plutonium one of the most toxic substances known?