XXX Chats

dating lendy

Difference between radioactive decay radiometric dating

There are a number of implausible assumptions involved in radiometric dating with respect to long time periods.

One key assumption is that the initial quantity of the parent element can be determined.

This makes different elements useful for different time scales of dating; an element with too short an average lifetime will have too few particles left to reveal much one way or another of potentially longer time scales.However, the nucleus has a strong positive charge and the electron shells have a strong negative charge.Any incoming negative charge would be deflected by the electron shell and any positive charge that penetrated the electron shells would be deflected by the positive charge of the nucleus itself.Most are determined experimentally by institutions such as CERN with the Large Hadron Collider.Decays are very random, but for different elements are observed to conform to statistically averaged different lifetimes.With uranium-lead dating, for example, the process assumes the original proportion of uranium in the sample.One assumption that can be made is that all the lead in the sample was once uranium, but if there was lead there to start with, this assumption is not valid, and any date based on that assumption will be incorrect (too old).For example, in uranium-lead dating, they use rocks containing zircon (Zr Si O Zircon and baddeleyite incorporate uranium atoms into their crystalline structure as substitutes for zirconium, but strongly reject lead.Zincon has a very high closure temperature, is very chemically inert, and is resistant to mechanical weathering.For these reasons, if a rock strata contains zircon, running a uranium-lead test on a zircon sample will produce a radiometric dating result that is less dependent on the initial quantity problem.Another assumption is that the rate of decay is constant over long periods of time, which is particularly implausible as energy levels changed enormously over time.

Comments Difference between radioactive decay radiometric dating