19 explain carbon 14 radioactive dating am christian dating muslim

One isotope, carbon-14, is particularly useful in determining the age of once-living artifacts.

A tiny amount of carbon-14 is produced naturally in the upper reaches of the atmosphere, and living things incorporate some of it into their tissues, building up to a constant, albeit very low, level.

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.

Contrary to the belief of some people, irradiation of food Radioactive isotopes have numerous medical applications—diagnosing and treating illness and diseases.

One example of a diagnostic application is using radioactive iodine-131 to test for thyroid activity (Figure 15.4 "Medical Diagnostics").

However, therapeutic applications usually require much larger doses because their purpose is to preferentially kill diseased tissues.

Technetium-99 can also be used to test thyroid function.

Bones, the heart, the brain, the liver, the lungs, and many other organs can be imaged in similar ways by using the appropriate radioactive isotope.

For instance, leaks in underground water pipes can be discovered by running some tritium-containing water through the pipes and then using a Geiger counter to locate any radioactive tritium subsequently present in the ground around the pipes.

(Recall that tritium is a radioactive isotope of hydrogen.) Tracers can also be used to follow the steps of a complex chemical reaction.

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Once a living thing dies, it no longer acquires carbon-14; as time passes the carbon-14 that was in the tissues decays.

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