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Seeing this connection will help students to understand how scientists can determine the age of a sample by looking at the amount of radioactive material in the sample.If two nuclei have different masses, but the same atomic number, those nuclei are considered to be isotopes.It is a great introduction to the scientific process of deducing, forming scientific theories, and communicating with peers.
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.
This site enables the teacher to see who is having difficulty and who is not by looking at the speed of the student.
Students must get the questions correct before proceeding to the next page.
Isotopes have the same chemical properties, but different physical properties.
An example of isotopes is carbon, which has three main isotopes, carbon-12, carbon-13 and carbon-14.
Radiocarbon dates do not tell archaeologists exactly how old an artifact is, but they can date the sample within a few hundred years of the age.
NGSS Guided Inquiry Explain about radiation and half-lives of isotopes.
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 has a half-life of 5730 years, which means that if you take one gram of carbon-14, half of it will decay in 5730 years. The ratio of the amounts of carbon-12 to carbon-14 in a human is the same as in every other living thing.