Not all of the atoms of a radioactive isotope (radioisotope) decay at the same time.Rather, the atoms decay at a rate that is characteristic to the isotope.Carbon-14 is radioactive and undergoes radioactive decay.Radioactive materials contain some nuclei that are stable and other nuclei that are unstable.This experiment is best used by student working in pairs.Grade Level: 5-12 grade Disciplinary Core Ideas (DCI) 3-5ETS1-2, MS-ESS1-4, HS-ESS1-6 Time for Teacher Preparation 40-60 minutes – To gather materials Activity Time: 40-60 minutes (1 Class Period) Materials: Objectives Students try to model radioactive decay by using the scientific thought process of creating a hypothesis, then testing it through inference.
An example of isotopes is carbon, which has three main isotopes, carbon-12, carbon-13 and carbon-14.
He was employed at Caltech's Division of Geological & Planetary Sciences at the time of writing the first edition.
He is presently employed in the Space & Atmospheric Sciences Group at the Los Alamos National Laboratory.
Description: With the Half-Life Laboratory, students gain a better understanding of radioactive dating and half-lives.
Students are able to visualize and model what is meant by the half-life of a reaction.