Tritium has a half-life of 12.5 years. If you had a sample of 8.00 grams of tritium today, how many grams of tritium would you have in 37.5 years?
A)8.00 g
B)4.00 g
C)2.00 g
D)1.00 g

Question

Quizplus · Accepted Answer

Tritium has a half-life of 12.5 years, so in 37.5 years (which is 3 half-lives), the amount of tritium would be reduced to 1/8 of the original amount. Starting with 8.00 grams, after 3 half-lives, you would have 1.00 gram remaining.

Tritium Has a Half-Life of 12