Assumptions of radiometric dating

We can measure directly, for example by using a radiation detector, and obtain a good estimate of by analyzing the chemical composition of the sample.

The half-life , specific to each nuclide, can be accurately measured on a pure sample, and is known to be independent of the chemical composition of the sample, temperature and pressure.

The key is to measure an isotope that has had time to decay a measurable amount, but not so much as to only leave a trace remaining.

Given isotopes are useful for dating over a range from a fraction of their half life to about four or five times their half life.

One problem is that potassium is also highly mobile and may move into older rocks.

This depends on the decay of uranium-237 and uranium-238 to isotopes of lead.

Another limitation is that carbon-14 can only tell you when something was last alive, not when it was used.

YEC biblical literalists are necessarily bound to the dogmatic religious conclusion that the Earth is of a certain age based on a particular literal interpretation of the Genesis creation myth.Carbon dating works on organic matter, all of which contains carbon.However it is less useful for dating metal or other inorganic objects.This is consistent with the assumption that each decay event is independent and its chance does not vary over time.The solution is: where is the half-life of the element, is the time expired since the sample contained the initial number atoms of the nuclide, and is the remaining amount of the nuclide.

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