Isotope used in dating old objects

Social Science. The approximate age of ancient artifacts can be determined as long as the artifact is not older than 50, years. This would be wood, plants, animals and of course humans. Carbon is used for dating because it is radioactive and considered unstable. They collide with the N atoms and convert them into C atoms. This collision changes a proton into a neutron.
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Willard Libby and Radiocarbon Dating

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Carbon, Chemical Element - structure, reaction, water, uses, elements, proteins, metal, gas

Geologists often need to know the age of material that they find. They use absolute dating methods, sometimes called numerical dating, to give rocks an actual date, or date range, in number of years. This is different to relative dating, which only puts geological events in time order. Most absolute dates for rocks are obtained with radiometric methods. These use radioactive minerals in rocks as geological clocks. The atoms of some chemical elements have different forms, called isotopes. These break down over time in a process scientists call radioactive decay.
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Dating Techniques

Radioactive isotopes have a variety of applications. Generally, however, they are useful because either we can detect their radioactivity or we can use the energy they release. Radioactive isotopes are effective tracers because their radioactivity is easy to detect. A tracer is a substance that can be used to follow the pathway of that substance through some structure.
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By: Tracy V. When paleontologist Mary Schweitzer found soft tissue in a Tyrannosaurus rex fossil , her discovery raised an obvious question -- how the tissue could have survived so long? The bone was 68 million years old, and conventional wisdom about fossilization is that all soft tissue, from blood to brains , decomposes. Only hard parts, like bones and teeth, can become fossils. But for some people, the discovery raised a different question.
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