7. It takes 1.31 billion years for radioactive potassium-40 to drop to half its original size. How much of a 10 gram sam
Posted: Wed May 11, 2022 10:37 pm
7. It takes 1.31 billion years for radioactive potassium-40 to drop to half its original size. How much of a 10 gram sample of potassium-10 would be left after 4 billion years?