How many half-lives have passed when there are 3 times as much daughter isotope as parent isotope?

Question

asked May 3, 2020 46.6k views

1 Answer

Phil Calvin · Answer 1 · 2020-05-08T12:10:35+0000

Answer:

2 half lives.

Step-by-step explanation:

Suppose there are 100g of parent isotope at the start.

After 1 half-life there will be 50g of parent and 50g of daughter isotope.

After another half life there is 25 g of parent and 75g of daughter isotope.