A certain radioactive element has a half-life of 12 minutes. At what time is the substance decaying at a rate of 3.466 grams per minute if there are 120 grams present initially?
A) t = 0
B) t = 0.693 min
C) t = 0.058 min
D) t = 12 min

Question

Quizplus · Accepted Answer

The decay rate is maximum at the beginning and decreases over time. At t = 12 min, the decay rate is calculated using the formula: rate = (ln(2)/half-life) * initial amount. Substituting the values gives the rate as approximately 3.466 grams per minute.

A Certain Radioactive Element Has a Half-Life of 12 Minutes