Question

Carbon-14 has a half-life of approximately 5,730 years. How many half-lives have occurred in a sample that contains less than 10 percent of the original amount of the parent isotope?

Answer 1

Answer:

4 Half-lifes

Explanation:

1 half-life : 50%

2 half-life : 25%

3 half-life : 12.5%

4 half-life : 6.25%