Infographic 22.2.

-Refer to Infographic 22.2. If the half-life of a certain radioactive isotope is 5 years and 100 atoms of parent material exist in the original sample, how many parent atoms will be present in the sample after 10 years?

Question

Infographic 22.2.

-Refer to Infographic 22.2. If the half-life of a certain radioactive isotope is 5 years and 100 atoms of parent material exist in the original sample, how many parent atoms will be present in the sample after 10 years?

Quizplus · Accepted Answer

After 10 years, which is two half-lives (5 years each), the number of parent atoms will be reduced to one-quarter of the original amount. Starting with 100 atoms, after one half-life (5 years), 50 atoms remain, and after the second half-life (another 5 years), 25 atoms remain.

Infographic 22.2. -Refer to Infographic 22.2. If the Half-Life of a Certain