Question

If the first-order half-life of tritium (H) is 12.26 years, what amount of time is necessary for it to lose 75% of its radioactivity? A) 12.26 6 years B) 24.52 years C) 36.78 years D) 49.04 years E) 61.30 years

Answer 1

The correct amount of time necessary for tritium to lose 75% of its radioactivity is 49.04 years.

Step-by-step explanation:

The first-order half-life of tritium (H) is 12.26 years. This means that after 12.26 years, only half of the original tritium sample will remain. After another 12.26 years, half of the remaining tritium will decay, leaving only a quarter of the original sample. Following this pattern, it will take a total of 48.78 years for tritium to lose 75% of its radioactivity. Therefore, the correct answer is option D) 49.04 years.

Answer 2

To lose 75% of its radioactivity, tritium will take 24.52 years.

Step-by-step explanation:

To find the amount of time necessary for tritium to lose 75% of its radioactivity, we can use the concept of half-life. The half-life of tritium is given as 12.26 years. In each half-life, the amount of tritium will decrease by half. Therefore, to lose 75% of its radioactivity, it will take 2 half-lives.

So, the total amount of time necessary would be 2 * 12.26 years = 24.52 years. Therefore, the correct answer would be B) 24.52 years.