# The Mathematic of finding the Decay Product Compoistion of Pitchblende/Uraninite [closed]

Just as the title says. I’m curious as to how you would go about figuring out the amount of decay products in a given sample of Pitchblende/Uraninite. I would hazard a guess at using the half life formula over and over but something seems off about doing that.

• I don't understand your question. You can analyse a sample and immediately know the composition. Do you want to derive a former composition, e.g. at 10 million or a billion years ago? – Karl Apr 14 '18 at 6:50
• He may not immediately know, some decay products will be in trace amounts and some will be very transient. – Güray Hatipoğlu Apr 14 '18 at 6:59
• Karl: I trying to figure out what a given sample day 10kg or so of Pitchblende would contain in terms of decay products. I.e. the element composition of Pitchblende as of today assuming it was made when the earth was formed – Dalis Apr 14 '18 at 7:27

Well, it is straightforward. You get the amount of radioactive compounds in your mineral. Then find out the decay chain reactions, it generally goes from Uranium to Lead.