Tritium,a radioactive isotope of hydrogen,has a half-life of 12.4 years.Of an initial sample of 33 grams,how much will remain after 69 years?
A)0 grams
B)29.1351 grams
C)10.9074 grams
D)8.2500 grams
E)0.6973 grams

Question

Tritium,a radioactive isotope of hydrogen,has a half-life of 12.4 years.Of an initial sample of 33 grams,how much will remain after 69 years? ​
A)0 grams
B)29.1351 grams
C)10.9074 grams
D)8.2500 grams
E)0.6973 grams

Quizplus · Accepted Answer

To find the remaining amount of a radioactive isotope after a certain period, you can use the formula: remaining amount = initial amount * (1/2)^(time/half-life). Here, the initial amount is 33 grams, the time is 69 years, and the half-life is 12.4 years. Plugging these values into the formula gives: 33 * (1/2)^(69/12.4) = 33 * (1/2)^(5.5645) ≈ 0.6973 grams.

Tritium,a Radioactive Isotope of Hydrogen,has a Half-Life of 12