Suppose a laboratory has a 26 g sample of polonium-210. The half-life of polonium-210 is about 138 days. How many half-lives of polonium-210 occur in 276 days? How much polonium is in the sample 276 days later?
A.) 2; 1,794 g
B.) 2; 6.5 g
C.) 3; 3.25 g
D.) 2; 13 g