Atomic dating using isotopes
C-14 is another radioactive isotope that decays to C-12. Because of its short half-life, the number of C-14 isotopes in a sample is negligible after about 50,000 years, making it impossible to use for dating older samples. in Earth-Space Science from West Chester University of Pennsylvania.
C-14 is used often in dating artifacts from humans. Fiore taught high school science for 7 years and offered several teacher workshops to regarding education techniques.
These samples are carefully cataloged and analyzed with a mass spectrometer.
By comparing this ratio to the half-life logarithmic scale of the parent isotope, they are able to find the age of the rock or fossil in question.
There are several common radioactive isotopes that are used for dating rocks, artifacts and fossils. U-235 is found in many igneous rocks, soil and sediment.
Many rocks and organisms contain radioactive isotopes, such as U-235 and C-14.
These radioactive isotopes are unstable, decaying over time at a predictable rate.
Let t stand for time and N(t) stand for the number of atoms at time t .