Application of isotopes in carbon dating Cam2 melayu live free chat
The amount of radioactive iodine that collects there is directly related to the activity of the thyroid, allowing trained physicians to diagnose both hyperthyroidism and hypothyroidism.
Iodine-131 has a half-life of only 8 d, so the potential for damage due to exposure is minimal.
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.
Produce such as tomatoes, mushrooms, sprouts, and berries are irradiated with the emissions from cobalt-60 or cesium-137.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.The half-life of radioactive isotopes is unaffected by any environmental factors, so the isotope acts like an internal clock.For example, if a rock is analyzed and is found to contain a certain amount of uranium-235 and a certain amount of its daughter isotope, we can conclude that a certain fraction of the original uranium-235 has radioactively decayed.
We know these steps because researchers followed the progress of carbon-14 throughout the process.