If an object has 25% of the C-14 activity as a living organism,the age of the item is:

Name: If an object has 25% of the C-14 activity as a living organism,the age of the item is:
Brand: Quizplus
Rating: 4.8 (55 reviews)

Question

If an object has 25% of the C-14  activity as a living organism,the age of the item is:

Quizplus · Accepted Answer

The half-life of C-14 is approximately 5,700 years. If the object has 25% of the C-14 activity of a living organism, then it has gone through two half-lives (50% after one half-life and 25% after two half-lives). Therefore, the age of the item is 2 x 5,700 years = 11,400 years, which is closest to answer choice A.

If an Object Has 25% of the C-14 Activity