Uranium (U)
* Uranium-238 (U-238): This is the most common isotope of uranium, and it decays through a long chain of alpha and beta decays. The final stable product is lead-206 (Pb-206).
* Uranium-235 (U-235): Another naturally occurring isotope of uranium, it also undergoes a long decay chain. The final stable product is lead-207 (Pb-207).
Potassium (K)
* Potassium-40 (K-40): This is a naturally occurring radioactive isotope of potassium. It decays through two pathways:
* Beta decay: Produces calcium-40 (Ca-40).
* Electron capture: Produces argon-40 (Ar-40).
Rubidium (Rb)
* Rubidium-87 (Rb-87): The most abundant isotope of rubidium, it undergoes beta decay to produce strontium-87 (Sr-87).
Important Notes:
* Decay chains: The decay products for uranium-238 and uranium-235 involve a series of intermediate radioactive isotopes.
* Dating: The decay of these radioactive isotopes is used in radiometric dating to determine the age of rocks and fossils.
Let me know if you have any other questions!
