Question

If the half-life of a decaying isotope is 10 years, which statement is true after 8 years?

A. There are more daughter nuclei than parent nuclei in a sample.
B. The numbers of parent nuclei and daughter nuclei in a sample are equal.
C.There are more parent nuclei than daughter nuclei in a sample.
D.The relative numbers of nuclei cannot be determined until 10 years have passed.

Answer 1

C

Step-by-step explanation:

Since it has not reached 1/2 life there is still more than 1/2 of the original parent nuclei present.