1.The least stable nucleus of any atom occurs in the element
2. A 10.0 g sample of radon 222, which has a half life of 3.8 days, was produced in a laboratory last Monday. On the following Monday, one week later, about how many grams of the sample will remain?
A. 7.5 g
b. 5.0 g
c. 2.5 g
d. 1.0 g