Register
A fossil bone has 25% of this new radioactive element remaining. If the half-life of this new element is 10,000 years, how old is the fossil bone?
501 views
0 votes
A fossil bone has 25% of this new radioactive element remaining. If the half-life of this new element is 10,000 years, how old is the fossil bone?

User Konstantin Yovkov
by
4.1k points

1 Answer

6 votes
the element starts off as 100%. half of 100% is 50% and half of 50% is 25%. the element has emitted 2 times the half life which is 10,000 x 2 = 20,000

the fossil bone is 20,000 years old
User Vitaliis
by
4.9k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

4.5m questions

5.8m answers

Other Questions

Gregor Mendel studied pea plants to determine the patterns of inheritance. What is not a reason Mendel used pea plants in his experiments? Check all that apply.
ANSWER AND EXPLAIN PLZ:)
Gibberellic acid stimulates the cells of germinating grass seeds to produce mrna molecules that code for hydrolytic enzymes. In this case the role of gibberellic acid can best be described as that of
Climate change is a ___ environmental change
Pls i need help??!!! write a sentence contrast evaporation and condensation.
Link Copied!