Technetium-99 (half-life = 6.01 h) is used in medical imaging. How many half-lives would go by in 14.0 h?

Answer 1

To determine how many half-lives would go by in 14.0 hours, divide the total time by the half-life:

Number of half-lives = 14.0 h / 6.01 h = 2.33

Since we cannot have a fraction of a half-life, we must round down. Therefore, in 14.0 hours, approximately 2 half-lives would go by.