Nucleus: Practice Problem & Solution

Solution Explained:

To solve this problem, we apply the core principles of Nucleus. Understanding the underlying formula is key to arriving at the correct answer below:

At $t_1$, fraction remaining is $1 - 1/3 = 2/3$. At $t_2$, fraction remaining is $1 - 2/3 = 1/3$. The ratio of remaining nuclei is $(1/3)/(2/3) = 1/2$. This represents exactly one half-life, which is 50 days.