Question

I if a radioactive material has a 10 year half-life, how much of a 100 g sample will be left after 20 years?

A. 50g
B. 6.25g
C. 12.50g
D 25g​

Answer 1

I believe the answer to your question is C) 12.50g.

Since it has a half life of 10 years and the question asks for 30 years all you need to do is divide 100 in half 3 times.

Hope this helps!! :))