Answer to Question #144787 in General Chemistry for Joshua

Question

After 300 days have elapse 53% of a radioisotope sample decayed. What is the half-life of the radioisotope?

Answer 1

For half life, 50% should have decayed so we use proportions to find how many days 50% of the isotope had decayed.

53% is equivalent to 300days. We find 50%

(50÷53)×300=283days