Question

If you currently have 1 kg of Uranium^238, in how many years will you have 1/2 kg of Lead^206? PLEASE HELP!!!!!!!

Answer 1

half-life decay reaction is a first order reaction which uses the formula : t 1/2 = ln 2 / k where k is the decay constant and t 1/2 is the half-life of the material. ln 2 comes from the division of the material into half. k from literature is equal to 0.1551×10−9 yr−1. substituting, t1/2 = 4.468×109 years.

Answer 2

From literature, we would find that the half life of Uranium-238 is equal to 4.5x10^9 years. This is the same number of years to obtain 1/2 kg of Lead-206. Hope this answers the question. Have a nice day.