What different elements are used in radiometric dating

It disintegrates at a measured rate into calcium and argon.

Similarly, the radioactive element uranium decomposes into lead and some other elements.

By the way, it is important to understand that most rock strata “dates” were actually assigned long before the first use of radioactive age estimating methods in 1911.

The Carbon-14 age estimating method is, at best, only useful for estimating the age of things that are thousands of years old, not millions or billions.

The lowest age defended on a scientific basis is in the 6 to 10 thousand year range.

Evolutionism, of course, requires billions of years to support the plausibility of life's emergence and of subsequent Evolution from “amoeba” to man.

Mountains, erosion, and variations in climate were considered to be punishment for the sins committed by humanity.The problem seems to arise from basic wrong assumptions in the method (rubidium-strontium isochron).If such a sophisticated method is so flawed, geologist Dr.Steven Austin rightly wonders, "Has anyone successfully dated a Grand Canyon rock? The validity of the calculated date can be no stronger than the weakest link (weakest assumption) used in the calculation.What are some of the assumptions made by most Evolutionists in using these systems?