What percentage of a radioactive isotope would remain after three half-lives?
A)6.3 percent
B)12.5 percent
C)25.0 percent
D)50.0 percent

Name: What percentage of a radioactive isotope would remain after three half-lives? A)6.3 percent B)12.5 percent C)25.0 percent D)50.0 percent
Brand: Quizplus
Rating: 4.9 (35 reviews)

Question

Quizplus · Accepted Answer

After one half-life, 50% of the isotope remains. After two half-lives, 25% (half of 50%) remains. After three half-lives, 12.5% (half of 25%) remains.

What Percentage of a Radioactive Isotope Would Remain After Three