Isoopesgreenspun.com : LUSENET : Introductory Geology, Oswego State : One Thread
In the notes there is a chart explaining half-lives. After 1 half life the parent and the daughter has the same amount. I thought that when the parent radioisotope decays eventually stable daughter isotopes are formed. If it is decayed how can parent and daughter isotopes be the same? I don't understand.
-- Jihan Antrobus (email@example.com), March 26, 2001
After one half life the parent and daughter will be the same but as time continues, the second half life will be 1/2 of what is left or 1/4 of the original and the daughter will be 3/4 of the original parent. take half of the parent at each half life and add that to the daughter. I got this from the example Dr Gabel wrote on the chalk board. eventually you will get a stable or daughter isotope. It may take many half lifes to get a stable isotope.
-- Sandra Feocco (firstname.lastname@example.org), April 05, 2001.