Half life dating activity

Half life dating activity

The results showed that Ötzi died over 5000 years ago, sometime between 33 BC. Uranium has a very long half-life and so by measuring how much uranium is left in a rock its approximate age can be worked out. To demonstrate that the rates of decay of unstable nuclei can be measured, that the exact time that a certain nucleus will decay cannot be predicted, and that it takes a very large number of nuclei to find the rate of decay.

As long as you follow these four steps you will always be able to accurately determine the age of a rock or fossil.It uses the naturally occurring radioisotope carbon-14 (14C) to estimate the age of carbon-bearing materials up to about 58,000 to 62,000 years old.Carbon has two stable, nonradioactive isotopes: carbon-12 (12C) and carbon-13 (13C).On the cover of your ESRT in the top left box you will find the Radioactive Decay Data for four isotopes which we will focus on.Carbon 14 occurs naturally, and is absorbed by all living things when we eat and drink.

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