You are trying to determine the half-life of a new radioactive element you have isolated. You start with 3 grams, and 4 days later you determine that it has decayed down to 0.1 gram. What is the half-life? Round your answer to three decimal places. Select the answer rounded to three decimal places.
A)0.815 days
B)1.630 days
C)0.408 days
D)2.446 days
E)1.223 days

Question

Quizplus · Accepted Answer

The half-life of a radioactive element is the amount of time it takes for half of the element to decay. In this case, we start with 3 grams of the element, and 4 days later we determine that it has decayed down to 0.1 gram. This means that half of the element has decayed in 4 days, so the half-life is 4 days.

You Are Trying to Determine the Half-Life of a New