Suppose the half-life of some element is 2 days.If you purchase 10 grams of the element (which was produced in a laboratory 4 days ago),how much of this element would you have 3 days after you purchased it?

Question

Quizplus · Accepted Answer

Since the half-life of the element is 2 days, after 2 days half of the element will have decayed, leaving 5 grams. After another 1 day (3 days after you purchased it), another half will have decayed, leaving 2.5 grams. Therefore, the correct answer is choice C, as it is between 1.25 grams and 2.5 grams.

Suppose the Half-Life of Some Element Is 2 Days