Question

question 13 (1 point) the half - life of polonium - 218 is 3.00 minutes. how many half - lives pass after 18.0 minutes ? 2 3 4 5 6

Explanation:

Step1: Identify relevant values

Let $t = 18.0$ minutes (total time) and $t_{1/2}=3.00$ minutes (half - life).

Step2: Use formula for number of half - lives

The formula for the number of half - lives $n$ is $n=\frac{t}{t_{1/2}}$. Substitute $t = 18.0$ and $t_{1/2}=3.00$ into the formula: $n=\frac{18.0}{3.00}=6$.

Answer:

E. 6