The half-life of strontium-90 is 28.1 years .Calculate the percent of a strontium sample left after 100 years.

Question

Quizplus · Accepted Answer

The percent of a strontium sample left after 100 years can be calculated using the formula for radioactive decay, which is: final amount = initial amount * (1/2)^(time/half-life). Here, time = 100 years and half-life = 28.1 years. So, the fraction remaining is (1/2)^(100/28.1) ≈ 0.085 or 8.5%.

The Half-Life of Strontium-90 Is 28