If a sample of ²³³Pa takes 62.7 days to decrease to 20.0% of its original mass,what is its half-life? A)0.0370 days B)27.0 days C)157 days D)195 days

Question

Quizplus · Accepted Answer

The decay of a radioactive substance is exponential. Using the formula for exponential decay, we can determine the half-life. If 20% of the original mass remains after 62.7 days, then 80% has decayed. The half-life is the time it takes for half (50%) of the substance to decay. Solving the decay equation for half-life gives approximately 27.0 days.

If a Sample of 233Pa Takes 62

If a Sample of ²³³Pa Takes 62