# Carbon dating calculation sample

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&#x20;[![View](https://i.imgur.com/hdBcR1O.png)](http://bit.ly/FastDating18) \\

One rare form has atoms that are 14 times as heavy as hydrogen atoms: carbon-14, or 14C, or radiocarbon. Secular scientists have estimated the ages of diamonds to be millions to billions of years old using other radiometric dating methods.\
&#x20;![carbon dating calculation sample](http://2.bp.blogspot.com/--w4QlrkbOlo/VSAOU0GTMNI/AAAAAAAARK0/-37PxhO7STg/s1600/088A-Image%2BHalf%2BLifes%2BChart.jpg)\\

This means that given a statistically large sample of carbon 14, we know that if we sit it in a box, go away, and come back in 5730 years, half of it will still be carbon 14, and the other half will have decayed. In the 1960s, was able to use the tree-ring sequence to show that the dates derived from radiocarbon were consistent with the dates assigned by Egyptologists. Thus, our equation for modeling the decay of 14C is given by,.\
&#x20;![carbon dating calculation sample](http://mathcentral.uregina.ca/QQ/database/QQ.02.06/meadow3_files/meadow3.2.gif)\\

**How Carbon-14 Dating Works** - Animals eat the plants so they too have carbon-14 in their tissues.\
&#x20;![carbon dating calculation sample](http://slideplayer.com/1587988/5/images/4/Radiocarbon+dating+How+does+it+work.jpg)\\

Archaeologists use the exponential, radioactive decay of carbon 14 to estimate the death dates of organic material. The stable form of carbon is carbon 12 and the radioactive isotope carbon 14 decays over time into nitrogen 14 and other particles. Carbon is naturally in all living organisms and is replenished in the tissues by eating other organisms or by breathing air that contains carbon. At any particular time all living organisms have approximately the same ratio of carbon 12 to carbon 14 in their tissues. When an organism dies it ceases to replenish carbon in its tissues and the decay of carbon 14 to nitrogen 14 changes the ratio of carbon 12 to carbon 14. Experts can compare the ratio of carbon 12 to carbon 14 in dead material to the ratio when the organism was alive to estimate the date of its death. Radiocarbon dating can be used on samples of bone, cloth, wood and plant fibers. The half-life of a radioactive isotope describes the amount of time that it takes half of the isotope in a sample to decay. In the case of radiocarbon dating, the half-life of carbon 14 is 5,730 years. This half life is a relatively small number, which means that carbon 14 dating is not particularly helpful for very recent deaths and deaths more than 50,000 years ago. After 5,730 years, the amount of carbon dating calculation sample 14 left in the body is half of the original amount. If the amount of carbon 14 is halved every 5,730 years, it will not take very long to reach an amount that is too small to analyze. When finding the age of an organic organism we need to consider the half-life of carbon 14 as well as the rate of decay, which is —0. For example, say a fossil is found that has 35% carbon 14 compared to the living sample. How old is the fossil? We can use a formula for carbon 14 dating to find the answer. If the fossil has 35% of its carbon 14 still, then we can substitute values into our equation. So, the fossil is 8,680 years old, meaning the living organism died 8,680 carbon dating calculation sample ago. Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.
