Radioactive isotope dating calculator
Radioactive isotope dating calculator - uganda dating line
The rule is that a sample is safe when its radioactivity has dropped below detection limits. So, if radioactive iodine-131 (which has a half-life of 8 days) is injected into the body to treat thyroid cancer, it’ll be “gone” in 10 half-lives, or 80 days.This stuff is important to know when using radioactive isotopes as medical tracers, which are taken into the body to allow doctors to trace a pathway or find a blockage, or in cancer treatments.
Knowing about half-lives is important because it enables you to determine when a sample of radioactive material is safe to handle.It can’t be used to determine the age of a moon rock or a meteorite.For nonliving substances, scientists use other isotopes, such as potassium-40.This has to do with figuring out the age of ancient things.If you could watch a single atom of a radioactive isotope, U-238, for example, you wouldn’t be able to predict when that particular atom might decay.The half-lives of certain types of radioisotopes are very useful to know.
They allow us to determine the ages of very old artifacts.As long as an organism is alive, the amount of C-14 in its cellular structure remains constant.But when the organism dies, the amount of C-14 begins to decrease.Scientists can use the half-life of Carbon-14 to determine the approximate age of organic objects less than 40,000 years old.By determining how much of the carbon-14 has transmutated, scientist can calculate and estimate the age of a substance. Isotopes with longer half-lives such as Uranium-238 can be used to date even older objects.Carbon-14 (C-14), a radioactive isotope of carbon, is produced in the upper atmosphere by cosmic radiation.