Thus any of the radioactive isotopes and its lead daughter product can be used for dating, or a combination may be used.
In addition, some of the longer-lived intermediate daughter products have uses in dating.
Two situations where we can do this involve Potassium-40 atoms and Carbon-14 atoms.
All radioactive atoms decay to become a more stable kind of atom.
Uranium 235 decays to lead 207, and Thorium 232 decays to lead 208.
The most common dating method involves the use of minerals like zircon and monazite that are relatively common in granitic rocks.It has become increasingly clear that these radiometric dating techniques agree with each other and as a whole, present a coherent picture in which the Earth was created a very long time ago.Further evidence comes from the complete agreement between radiometric dates and other dating methods such as counting tree rings or glacier ice core layers.The Uranium-238 radioisotope goes through 13 transitional stages before stabilizing into Lead-206 (U238 Pb206).In this instance, Uranium-238 is called the "parent" and Lead-206 is called the "daughter".