Reliability of radioactive dating
There are many different kinds of radiometric dating and not all conclusions we will reach can be extrapolated to all methods used.Also, different radiometric dating techniques independently converges with each other and with other dating techniques such as dendrochronology, layers in sediment, growth rings on corals, rhythmic layering of ice in glaciers, magnetostratigraphy, fission tracks and many other methods. There exists different versions, or isotopes of many elements.Let us critically examine each of these claims and see if they hold up against the science.While doing so, we will have to learn about how radiometric dating works.
In a last ditch effort, young earth creationists exclaim that scientists just assume, without warrant, that decay rate are constant. Decay rates have been shown to be constant, despite very high pressure and temperature.
Those that did the decaying are called parent nuclei.
If you have a rock that contains radioactive isotopes, these will decay over time.
Furthermore, by studying supernovas far away, scientist have determined that decay rates have been constant in the ancient past as well.
Not only that, different radioactive isotopes decay differently and it is enormously improbable that a postulated difference in decay rates would affect all of them in the same way, yet as we have seen, different radiometric dating methods converge on the same date (within margins of error).